Hi, I can develop this protection system and integrate it with your 3D models on creating the installer, it will only work on a computer that has been granted access through key registration, about filtering the files to be searched on a specific computer, I suggest having an admin dashboard panel where you can also see statistics on activation and filter option for pacific packages.
This project will take me not more than 3 days, kindly message me for further discussions.
Thanks with regards, Kevin