SNMP MIB BROWSER

Hi.
I am trying to configure the Trap Viewer (SNMP MIB BROWSER), to filter the traps sent by an application.
It work fine when the filter parameter is exactly the same as the event received (example: event code 3000) is easy to configure in the trap.parser.
But, my situation is more complex.
I need to filter a trap, when the filter parameter "contain" a determinated value (example: the trap received has a eventdescription like this: Operator LUIS - Login at 10:00 hs - from xxxx terminal ....), and I must filter all the traps where the operator is LUIS.
I try using dummy characters (%, $, *) without successfully result.
Can you help me?
Thanks
Luis