[syslog-ng] syslog-ng open source - Problem with filter rules - Performance

Hi I am using syslog-ng filter option to filter the log messages based on some filter criteria. Like log { source(s_network); filter(ABCD_filter); destination(d_ABCDfiles); }; log { source(s_network); filter(PQR_filter); destination(d_PQRfiles); }; log { source(s_network); filter(XYZ_filter); destination(d_XYZfiles); }; ... .. . In the above example the source is same for all the destination files but in this configuration all the filter rules are validating the log mesg. I want to configure it if mesg pass the filter ABCD criteria then it should not go to other filter and if it fails the ABCD filter criteria then it should go to next filter and so on. Does Syslog-ng support any macro or if-else.. for this?? - V