Not simultaneously.
At least on PC, if I have multiple accounts (not multiple characters) then you can run more than one at a time but with a single account, you'll log out of one and in on the other. If you forget to log out, as soon as you log in at the other location, it will kick you out. It is no different than going to a friends house and logging into their console. I suppose there could be some national borders where some games are prohibited, but I haven't heard anything about TD having any issue.