[syslog-ng] Auto routing to specific relay based on hostname

Guys, I am a newbie to syslog-ng solution. I am trying to create a common config file to be distributed across client machines in San Jose, Dallas and Dublin colos. Every colo has 1 dedicated relay which forwards log data to a central server (SJ|DU|DA)_ client --> (SJ|DU|DA)_ relay --> SYSLOG-NG server the clients located in these colos have sj,du & da in their hostnames eg da1xxx058, du1xxx059, sj1xxx060. I want to setup the config in a way that based on hostname the config decides what relay to connect to. Is this possible ? -- Regards, Sagar Naravane