Assign Manager Roles for Specific Locations?

Hello – I would like to grow my directory site and eventually allow “sub-admins” to manage the listings in a given location. For example, I may hire a manager who oversees a specific neighborhood in New York City, another manager who oversees all of Los Angeles, and third manager who oversees all of Colorado and Utah. Ideally, they would be able to add/edit/delete the place listings and events in the locations that I assign to them through the front-end UI (without causing a conflict with the “Claim Listing” addon). Is this functionality currently available?

On a separate but related note, is there a plugin or widget that would allow dedicated info to show on specific location pages (for example, when looking at Los Angeles the widget could say “Your local representative is Joe Smith” and in Utah the widget could say “Your local representative is Jane Doe”).

Thanks!