Redmine

You can create a new field under Administration -> Custom Fields.
Select "Users" and when creating the field check the option "Used as a filter"
As soon as the field in the user menu has been filled in, it appears in the overview.
P.S.: My English isn't any better either ;)

Thank you so much for your information. I created User Custom field but I want to Users if when the opened issue, issue assigned to User's custom field automatically. Can you help me?
Example;
User has a r&d value in custom field and user opened a any issue automatically assign to R&D custom field.

I hope i could explain that.

This works best with the "Category" function
You can create different ticket categories within a project and specify to whom (person or group) this is then assigned.
RedmineProjectSettings