When locked on to a rule and associations is selected, provide add/remove options of users from that rule screen.
The benefits are in saving time and improving usability. Also it can ease any confusion and burden that occurs when multiple logins (in tabs) are opened on the screen.
PROPOSED IDEA
PATH to an Associations screen would be the following
Thrive UX -> System Administration -> Select a login -> Applications -> Associate -> Select (single click) a Rule. Select the option "Associations" on the action bar. The result is a list of entities (roles and logins) associated to that rule. The solution would be provide options to "Add" and "Remove" an entity (if selected or Windows Multi-selected) from this screen.