Probably not would be my immediate response to your question. It is a little vauge. Could you go into more detail about what you are trying to do and perhaps we can find an alternative.
when one user changes some info in the db that another user should be aware of I want to bring attention to this. An audio event would be ideal. just a quick - hey look here.
I still dont think you are providing enough information but lets take a stab.
I think that if you use some sort of log table with tiemstamp, you can have a Install On Timer script check every few minutes if anything new has been added to that log table and then prompt the user. If you have lots of users, I would think that this would become unproductive and/or rather annoying.