Plug-In To Assign Images To Users/Clients?

As a graphic designer, I am wondering if either:

1. there is a WordPress plugin that will allow me, as an administrator, to upload a client image and assign it to a user profile; or
2. there is a simple way to hack WP into doing what I stated in #1?

I want clients to have the ability to log-in once to my WordPress site, and to click on a “user gallery” page which will only show the private images/graphics that were assigned/completed for them.

Any help would be greatly appreciated.