Some devs just have restrictions for one reason or another e.g. untested. In this case it's probably because CM11 is based on 4.4 while CM10.2 is based on the older 4.3.
Sometimes there are genuine reasons, for example, one app I tried (demand 5) is unstable on my old tablet.
It's just a matter of trying it out via sideloading if you have another system to get APKs from.