Trustless node operating in more than one owner

How to own and operate a NFT NODE in more than one people? May you share your ideas, please? To be more clear I mean operate NFT NODE, so It is just I licence to operate any PC under NFT Licence to be a node operator.

Do you think that would be possible operate the node on external server with my crypto domain where would be somehow cryptographically hidden the přivede key. That we can divide our private key during creation. And letter just everybody gave it into hashing machine to provide crypto domain a access to operate a node?