I don't understand much about this kind of programming. But can you use more than one looper? Isn't this just some kind of lock in pedalboard software?
Could you elaborate about the function you seek? With a single looper, you can add overdubs to a recorded loop, so if that's what you want, then a single looper will do that. On the other hand, if you're looking to record several independent loops that you can trigger on and off by pressing different footswitches, then you would probably need to use multiple instances of the looper effect in the Zoom, and I don't know if that's possible.
Use independent loopers like a RC-505/50/300 Loop Station... I know that you can't do it with the Zoom Guitar Lab... There's a restriction... You can only use 1 per "Patch"... Iam wondering with there's a way to change the "program" and use multiples instances I'm trying my best (with my english!) hahaha