It does but this is only in an environment where the same computer is accessible by more than one people at the same time with different keyboards and monitors.

It does but this is only in an environment where the same computer is accessible by more than one people at the same time with different keyboards and monitors. In practice this is an extremely rare case and in that case (and assuming the people involved cannot just trust each other for some reason) the permissions can be set to only allow access to a single device per user.