I am not quite sure I understand why it is "cool" to be able to enter group names in Jenkins and restrict users that way. Since one of the points of Crowd is that you can set up a lot of stuff in that end and have all that centralized.
Haven't seen the setup in JIRA or Confluence. But it sounds pretty strange that they do that as it just seems like a redundant step to me.
But anyway. Since I'd rather set up the groups that have access in my Crowd instance. It would be nice if I didn't need to jump though the hoop of creating a group and entering it into Jenkins to get this plugin working.
Also the group I grant access to Jenkins come from an Active Directory and contain spaces. So I couldn't actually enter that if I wanted.