Allowing private ratings to entries

I hope this is possible, but I’ve got myself all confused and need help please!

I have a form where people subit a form (lets call it a story, with title and text box)

I would like selected “reviewers” to be able to give each “story”  a score (1 to 5). (i have WP handling the roles so I shoudl be able to assign users to review groups)

I (as admin user) would like to be able to see all stories, with their “review scores” and be able to output them sall as CSV. (I’m using dataTabales and ColVis plugins which work very nicely with FP.

But I would like “review scores” to be kept hidden to everyone else, apart from…

users can see their own “review scores” so they can see which “stories” they have reviewed, and which ones they havent.

I’m struggling how to setup and store this “review” score for each entry, while allowing users to see their review scores only.

I’m also wandering if its soemthing that can be achieved by taking the “testimonials” example, and making that hidden fro mall users.

Any and all help muchly appreciated.

Ben