multiple users for same wordpress account

Is there a plugin that would allow multiple usernames to share the same exact wordpress account? For example I have added property listings to my directory. I would like real estate agencies to be able to claim/add a listing to the directory which is obviously already possible, but normally in an agency there are many agents who manage their own listings under that company. I would like Agent1, Agent2 and agent3 to be able to share the same exact features and capabilities of the same exact posts as each other, while also retaining individual authorship for property listings.
so basically Agent1 would be the agency itself, and agents 2 and 3 would be able to add listings (essentially custom posts) as a child to agent1, but while showing the correct author for each listing.

I hope this is possible :slight_smile: