how can i know if an user uses only one database, and doesnt make another
database with the same username, password and server name, and uses both of
them in the same application?

I would like to know how to recognize a database (instance) as the one an
only the user can make, the only one than my application recognizes.

By the way , my application is in Delphi 4, and im using interbase 5 for the
Database.

Can you help me?

Thanks in advance