First Add new users and Set users & groups security on a new .mdw file
– Setting a default Admin user a password will let other user to log on that Database
Remember to secure a multiple database user you need to:
– change ownership of all the db object from the default admin user to the new created db admin
– Remove all permissions for the default admin user & users groups
– Grant permissions to the new users and groups.
Reference: “The complete reference Ms Access 2003” from Mc Graw Hill