kokojambo on "Assign tags to users"

Hello there,

I would be grateful if you could help me doing this:
I want my WordPress users to be able to assign tags to their profile page(tag cloud), by adding keywords in the “edit profile” page.
And I want WordPress to automatically assign tags from posts the users created- to their profiles.

Something with taxonomies/the_terms/user_meta_data(?)

Also if you know about any plugin that may help me- please share :)

Thanks and have a great day!