BuddyPress User Circles
BuddyCircles:- The BuddyPress User Circles plugin is an add-on for BuddyPress. It allows users to create lists of users, e.g. Family, Close Friends, Colleagues, etc.
Allow users to create circles of users(or lists of users).
Filter activity by circles.
And here is a list of all features for site admins:-
Limit circle creation by roles.
Configure if the circle will be a top-level tab or be managed under the friends component.
Restrict who can be added to the circle:- Friends or all members.
Control circle privacy.
Automatically create default circles for newly registered members.
Control notifications for add to circle or remove from the circle.
Customize notification emails.
BuddyCircles is most suitable when you want your users to have the ability to create multiple lists of users and optionally follow their activity.