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.