automated table population

Hi, here is my problem, I am working on an online file submission system. When a new category of files is created I create a new table based on that category. The purpose of this table is to hold a list of users that can post files to this category. I know this may not be the most elegant way of doing things but I have reasons for this. Anyway, when I create the new table I would like for the table to be automatically populated with the correct bunch of users. Is there any way of doing this? I was thinking of using finger and extracting info from the users on the system and based on the info extracted determine whether they should be entered into the table or not. I am not sure how possible this would be or if I can even get the correct type of info from finger to make the decision on each user. Any input/suggestions would be appreciated. Thanks. MDP