Additional Key

I have a need to rate users and products.

The users will be buyers or sellers of a product. A buyer will rate the sale which contains ratings for the product as well as the seller (Communication, shipping, product quality, etc). The seller will rate the buyer (Communication, payment, etc.). Both the buyer and seller sets of ratings need to contain the buyer id, seller id and product id. I would need to display reviews for one or more of these value. For example, I want to see all reviews by buyer id 10 and for seller id 25 and for product id 3190. Or see all reviews for buyer id 10.

Is anything like this possible with your product?