This may workâdepending on your criteria for community reviews. The organisers can post reviews and the community reviewers can leave a comment with a rating on that review.
I do not think this is what he is trying to accomplish. I believe he is trying to accomplish something like Newegg where "official" people / organization members can leave comments in a review much like NewEgg has a special background color for manufacturer responses.
In general I believe Simple Review is not designed to accomplish what he wants.
1) Simple review has zero mechanisms for managing organization submitted content, when that content something other than a review or comment. So if you are looking to have organizations submit artwork or software code you would need another component to manage that.
2) As I always stress, Simple Review is a "Review" component and not a "Rating" component. The design is based upon only a single "editorial style review" of each unique item. Then, below the review users can leave comments with ratings. Is this what you are trying to accomplish?
3) To create a review from the site's front it is highly recommended to limit permissions to specific registered users. The comments and ratings section can, if desired, be left public. But to each their own.