[galaxy-dev] Displaying tool select list according to user

Hello Galaxy users, I try to figure out how I can display a select list into a galaxy tool according to the connected user. I have several .loc files containing the paths for custom blast databases I have created for several users (user1.loc, user2.loc, and so on). I would like the blast tool to display the specific databases for the connected user (user1 or user2). Any idea on how to proceed ? Regards, Laure