I have not checked recently, but at one time not long ago if 2 devices used POP then the last one to log on would kick off the first one.

WxC by default allows 5 aliases for your one mailbox which might work for you since it gives you 5 user names. (I've asked them to change mine to separate mailboxes as that is what I needed, for personal vs. auction vs. whatever.)

Cheers,
Niel