Do you want to know if they are currently using it at this moment or if they have data in it?
logging wise, no, you can't see who is sending data to and from it. Did you try opening the db using sql manager. This could tell you if anyone added accounts. You should also be able to see when the last update was, so you can tell if they tried it and stopped using it or are activity using it.
Otherwise, i'll check on it.