Redmine

Currently Redmine can assign to user or group a ticket, but it would much usefull to assign multiple users or groups to a ticket (if it's enabled). At my company we don't have specified groups for each type of task and we creating groups on the fly when some issue are submited.

We dont want to create bunch of groups for the possible combinations because the ticketing system lack of an important feature, and this should be implemented into the core without use of a plugin.