Sure, you can do that, but it means physically connecting the Reader to a PC on the one account, and de-registering it, and then registering the Reader on the other account .... I don't know if a
PC can be on more than one account or not, I'd
think it was common sense that it could, but....
In any case, it seems like a lot of trouble to me, and I can't see why I'd care enough to go through it. Just speaking for myself, of course.