diff -ur redmine-0.9.3/app/controllers/issues_controller.rb redmine/app/controllers/issues_controller.rb
--- redmine-0.9.3/app/controllers/issues_controller.rb	2010-02-28 13:28:06.000000000 +0300
+++ redmine/app/controllers/issues_controller.rb	2010-03-14 10:51:35.847313790 +0300
@@ -187,7 +187,15 @@
     end
 
     if request.post?
-      @time_entry = TimeEntry.new(:project => @project, :issue => @issue, :user => User.current, :spent_on => Date.today)
+      if User.current.allowed_to?(:edit_time_entries, @project) and params[:time_entry]
+        user = User.find(Hash[params[:time_entry].to_a]["user_id"].to_i)
+      else
+        # TODO: Maybe I should throw an exception if the current user
+        # tries to edit a time entry he is not allowed to. I don't
+        # think it can happen with the actual flow.
+        user = User.current
+      end
+      @time_entry = TimeEntry.new(:project => @project, :issue => @issue, :user => user, :spent_on => Date.today)
       @time_entry.attributes = params[:time_entry]
       if (@time_entry.hours.nil? || @time_entry.valid?) && @issue.valid?
         attachments = attach_files(@issue, params[:attachments])
diff -ur redmine-0.9.3/app/controllers/timelog_controller.rb redmine/app/controllers/timelog_controller.rb
--- redmine-0.9.3/app/controllers/timelog_controller.rb	2010-02-28 13:28:06.000000000 +0300
+++ redmine/app/controllers/timelog_controller.rb	2010-03-14 10:52:21.161752414 +0300
@@ -210,8 +210,16 @@
   
   def edit
     (render_403; return) if @time_entry && !@time_entry.editable_by?(User.current)
-    @time_entry ||= TimeEntry.new(:project => @project, :issue => @issue, :user => User.current, :spent_on => User.current.today)
-    @time_entry.attributes = params[:time_entry]
+    if request.post? and User.current.allowed_to?(:edit_time_entries, @project)
+      user = User.find(Hash[params[:time_entry].to_a]["user_id"].to_i)
+    else
+      # TODO: Maybe I should throw an exception if the current user
+      # tries to edit a time entry he is not allowed to. I don't think
+      # it can happen with the actual flow.
+      user = User.current
+    end
+    @time_entry ||= TimeEntry.new(:project => @project, :issue => @issue, :user => user, :spent_on => User.current.today)
+    @time_entry.send(:attributes=, params[:time_entry], false)
     
     call_hook(:controller_timelog_edit_before_save, { :params => params, :time_entry => @time_entry })
     
diff -ur redmine-0.9.3/app/helpers/timelog_helper.rb redmine/app/helpers/timelog_helper.rb
--- redmine-0.9.3/app/helpers/timelog_helper.rb	2010-02-28 13:28:05.000000000 +0300
+++ redmine/app/helpers/timelog_helper.rb	2010-03-14 10:43:55.418369147 +0300
@@ -52,6 +52,13 @@
     activities.each { |a| collection << [a.name, a.id] }
     collection
   end
+
+  def user_collection_for_select_options
+    users = @projects = User.find(:all)
+    collection = []
+    users.each { |a| collection << [a.name, a.id] if a.allowed_to?(:log_time, @project) }
+    collection
+  end
   
   def select_hours(data, criteria, value)
   	if value.to_s.empty?
diff -ur redmine-0.9.3/app/views/issues/_edit.rhtml redmine/app/views/issues/_edit.rhtml
--- redmine-0.9.3/app/views/issues/_edit.rhtml	2010-02-28 13:28:06.000000000 +0300
+++ redmine/app/views/issues/_edit.rhtml	2010-03-14 10:48:21.554871727 +0300
@@ -20,6 +20,9 @@
         <% fields_for :time_entry, @time_entry, { :builder => TabularFormBuilder, :lang => current_language} do |time_entry| %>
         <div class="splitcontentleft">
         <p><%= time_entry.text_field :hours, :size => 6, :label => :label_spent_time %> <%= l(:field_hours) %></p>
+        <% if User.current.allowed_to?(:edit_time_entries, @project) %>
+          <p><%= time_entry.select :user_id, user_collection_for_select_options %></p>
+        <% end %>
         </div>
         <div class="splitcontentright">
         <p><%= time_entry.select :activity_id, activity_collection_for_select_options %></p>
diff -ur redmine-0.9.3/app/views/timelog/edit.rhtml redmine/app/views/timelog/edit.rhtml
--- redmine-0.9.3/app/views/timelog/edit.rhtml	2010-02-28 13:28:06.000000000 +0300
+++ redmine/app/views/timelog/edit.rhtml	2010-03-14 11:01:31.816092433 +0300
@@ -6,6 +6,9 @@
 
 <div class="box">
 <p><%= f.text_field :issue_id, :size => 6 %> <em><%= h("#{@time_entry.issue.tracker.name} ##{@time_entry.issue.id}: #{@time_entry.issue.subject}") if @time_entry.issue %></em></p>
+<% if User.current.allowed_to?(:edit_time_entries, @project) %>
+  <p> <%= f.select :user_id, user_collection_for_select_options, :required => true %> </p>
+<% end %>
 <p><%= f.text_field :spent_on, :size => 10, :required => true %><%= calendar_for('time_entry_spent_on') %></p>
 <p><%= f.text_field :hours, :size => 6, :required => true %></p>
 <p><%= f.text_field :comments, :size => 100 %></p>