You can conditionally execute any statements in your BRconfig.sys based on the windows/linux login of the user running BR by preceeding the line with @login_name.
@myname run menu @lgomez WSID 25 @ssmith PRINTER OKIDATA
This can significantly simplify the tailoring of BRCONFIG.SYS files through use of the @name statement prefix. Instead of having to place a separate BRCONFIG.SYS file on each client system, the clients could specify the login name of the user, and a common BRCONFIG.SYS file could contain the custom statements for all users, beginning the custom statements with @name for each login name.
If the windows login name contains spaces or periods, you must encapsulate it in quotes
@"Joe Tester" WSID 11