User Level Groups Tab
The user-level groups tab functions as a membership list. The groups tab under a selected user displays the the groups to which this user belongs, and any roles they may have in the group. Group members may be deleted or types of memberships may be adjusted.
Click on a user to bring up the "delete" option. To make this user a listen only member of a group, for instance, first remove them from the group, then go back to the department level group tab, select "Members," then add them under the correct conditions.