Some infrared devices, like the CPU-XA/Ocelot and JDS IRXpander, support infrared matching. The device will notify HomeSeer if it sees an infrared command that has been previously learned. You can set up HomeSeer to trigger and event on these matches. If the selected infrared device supports this feature, then the infrared match selection will be available.
This feature is useful if you would like to know when you power on your stereo. You could then change the lighting or perform some other action.
Note that the Applied Digital Ocelot can only match on the first 80 Infrared commands.