snmptrapd configuration help

[Christoph Doerbeck a242369]

I want to configure snmptrapd to only trap and log messages from
a specific community name.  Obviously I can't figure out how to do
it.

My configs are currently all over the place and not worth posting,
but I'm hoping someone might know what to do.

I.E: put _x _y _z in snmp.conf and _a _b _c in snmptrapd.conf and 
you are good to go.

- christoph