In theory, the modular nature of LMCE would allow you to add an LMCE Interface for a security system with a standard (rs232) interface with some fairly simple programming. In practice, I think the alarm system is one of the modules that the pluto guys didn't concentrate on as much as, say media streaming functionality, so it might be a little more concentrated. If you wanted to find a system with an interface and give it a shot, I'm sure there would be people here willing to help you get it working.