snmptrap does not accept regex

[Dziugas]

Hi!

Can you please help me to write regex for snmptrap?

I want accept string wich has "lhnNsmNotification" or "lhnUserNotification" words but not "lhnNsmNotificationManager" word.

Those examples does not works.
snmptrap["(?!.*lhnNsmNotificationManager)(.*lhnNsmNotificat ion.*|.*lhnUserNotification.*)"]
nor
snmptrap["(?!lhnNsmNotificationManager)(lhnNsmNotification| lhnUserNotification)"]

working example
snmptrap["(lhnNsmNotification|lhnUserNotification)"]

How to write "not" in snmptrap item?