OP is talking about the reverse. Using one Vision attached to two different laptops with two different iCloud accounts, so they can use it with both their work and personal computer.
The facial interfaces are just held on with magnets, so it's not unrealistic to think that people might swap them out regularly depending on who's using it. The interface is sized for the user so hygiene aside you'd probably want to swap it for a different one anyway.
Unfortunately Apple is charging $200 per extra facial interface though.
These devices are going to have your sweat, makeup, odours etc on them.
So you're really not going to want to share a device with anyone else.