[syslog-ng]SNMP source and destination

I just installed syslog-ng as a syslog concentrator for multiple network management applications that feed off syslog. I need to do the same thing with SNMP traps. I tried simple source and destination on the SNMP udp ports and it does grab and forward but not in any manner that makes sense to SNMP listeners on the detinations. Has anyone done any work on SNMP specific sources or destinations? If not, is anyone else interested and can anyone give me a gentle push into the sources (like where the udp source/destination code is)? mwa