Yes you can create a Main Form, add ThreeFields (1- Username, 2- Password, 3-Clock), You can set User Name and Password and a specific Time for Each User as from 6:00 to 7:00 user1 and from 7:00 to 7:30 user2 as on, if time is between 6:00 to 7:00 user 1 can open and edit the database after 7:00 the database will automatically close and exit and user1 can not enter the database when his time is over then the other use can enter and use the database, so you will know on which time which user is using your database.