Members of one group appointing and removing members of another group

I am missing the feature to give members of one group the ability to appoint and remove members of another group. We want to trust a few members to manage the members of another group (but not make them moderators).

Tricky problem from a UI perspective. At the moment group owner is part of the group, we would have to decouple it so group ownership is independent.

I do recall this popped up at least one time in the past, perhaps you can help find the previous discussions on meta.

Yea I realize that, yet it seems like the logical next evolutionary step to be able to do more with these groups. It’s what is needed to let some users decide which other users may join a certain category and carry a certain badge, without promoting them to moderator or admin.

I haven’t found it yet.

Note that I am not requesting a feature to let members of a group add others to their own group, but rather to let members of group A decide who is in group B while only moderators and admins can decide who is in group A. Just clarifying that some further.