Redmine

Sorry, forgot this:

Environment:
Redmine version 2.0.3.stable
Ruby version 1.8.7 (x86_64-linux)
Rails version 3.2.6
Environment production
Database adapter MySQL
Redmine plugins:
redmine_mylyn_connector 2.8.2.stable

Maybe there could be a new permission? But I'm not sure.

A better way would be to give the user the ability to set a special user who has certain permissions?

I think this is essentially the same as #8488. Though that issue was looking to extend visibility for private issues, in practice we're talking about the same action--a new kind of involvement in addition to author/assignee.

It also somewhat relates to one of my own feature requests (selfplug+10!), #12666, for this to be part of configuring the user-type custom field. Specifically, an optional check box when setting up a custom field that, when checked, means the user(s) selected in the list are involved in the issue.

Permissions don't really need to be any more complex than existing workflow tools.

+1

+1 required for me too