Any ITpro in the industry is used to a high number of user accounts, either it is admin- user, limited rights or ad-hoc user accounts. Now when it comes to biometry and fingerprint, this have often been solved by assigning one finger (!) for each account. By facial recognition this is rather more complex, but not impossible.
Hey, why not illustrate this with a video?
Thank you MVP Andy Malone for his camera and editor skills.