[syslog-ng] Outbound Facility Rewrite?

Hey folks. I have looked through everywhere I can find but cannot figure out how to rewrite the outbound syslog message to a remote host so that all messages come across on the same facility. The reason I need this is to automate sorting and parsing by type of device (all Linux on one facility, all IPS on another facility, Cisco firewalls on another, etc.). Is there a way to do this with syslog-ng? Regards, Randy B