Admin user, filter user list by users custom field value

Hi! In my project I'm setting a Overseer custom field for the user data, that custom field is a single option select, lets say Department 1, Department 2, etc. I've created a user group, child of Registered that can access the admin area like this:
Pulic
 - Registered
   - Overseers (can access admin area)

Is it possible to create an Overseer user that can only list CB users in the backend assigned to him? I mean, only users that have the custom Overseer field filled with his department.

Thanks a lot!

No, you'd have to use ACL for that. Users can't edit users that are above them or in different parent usergroups. Example as follows.

Public
- - Registered
- - - - Department 1
- - - - - - Overseers
- - - - Department 2
- - - - - - Overseers

With the above Overseers could only edit users in their respective departments. It is possible to block access to the profile edit pages (frontend and backend) to a degree using CB Auto Actions based off field data, but it won't block the visibility.

Ok so should I solve this requirement with joomla ACL alone ¿right?

In a limited way yes it will be solved. We don't officially have support for assigning users to moderator other users so at this time that's the only way to control access. In CB 3.0 we'll be reviewing moderator assignment.