How to pass @BOUSER in the SIMBA ODBC connection to GCP BQ?

Hello,

Has anyone had any success with passing the @BOUSER variable using a SIMBA ODBC connection to GCP BQ? Our universe is connecting to BQ with a service account using the SIMBA ODBC driver and it currently pulls back all of the data. We would like to pass the @BOUSER in the connection string to take care of RLS at the database level in GCP to avoid the complexities of applying RLS at the universe level.

Thanks!