Unique content-section per user

Hi there,
I’m trying to get a plugin that lets me assign unique content per user. Like this: User A will see this .jpg, this .pdf and this .png. User A will also see a .jpg, but a different one.
I’m searching for some kind of personalized widget area. I have found PrivateContent Multilevel Content which is able to do exactly what I need, but it uses it’s own users (why?) in stead of the WP-users. Users have to be added manually. So you can be logged in to the site but NOT logged into this plugin. shit. This is confusing isn’t it?

I’m looking to assign specific content (video’s, attachments, images) to WP-users. Not to user-roles but for each user individually. Can you guys help me out? Thanks!