Looked through a number of threads as well as searched the web for an answer without much luck.
We currently allow users to request a work site and then when we create their site, we add them to a special group called "Leaders". We give them Manage Hierarchy permission by default and want them to be able to add new users to their work site. However, we don't want them or other users outside of the Owners group to be able to add users with Full Control. Is it possible to trim the add users/assign permissions layout so that only users which are in the Owners group can add users with Full Control?