Definitely right Andrew. All 4 outputs are permanently active. But each individual NetX is addressed separately, so only one NetX will be sending out IR at any given moment. Therefore, if you have the same lighting panel (for example) in 2 rooms, then you only address the NetX in the room you are using at the time. Hope that makes sense! Can't think of any reason you'd need "zones" within the same room, but I bet there is one!

BTW, even if you could address each output separately, you'd still need a NetX in each room, as the cables are not long enough for that!