The Branch Information report (which can be found in the 'Data' section on The Hub) now contains data on users. You can see which branches are visible to which users and which branches a given user can see in the Hub.

Branches - shows a list of branches that are visible to the user.

Branches + tags - shows a list of branches that are visible to the user and their associated branch tags.

Branches + managers - shows a list of branches that are visible to the user and what other users have visibility of those branches. This page also has an option to search via manager.