it is currently not possible to change the owner component for an operation. Not in NX 12 and also not in the NX January 2019 Release. You can request an Enhancement Request at GTAC. I may be wrong but I believe this is not a common use case and therefore will probably not be implemented.
Hello, thank you for the quick reply.
What a pitty, i hoped there is something Magic Button there
Yeah you are right, its not a common use case, but i think it is same for the "change the owner component" for Physik objects. (Imagine that: if i want to have the rigid bodies, sensors, collosion bodies...etc etc in the Top assembly, why not the Operations from the subassembly? They are (almost) useless without them)