40 Tabling

Before I go on to ask my main question, another question. If you use two monitors to multitable, do you have to use two mouses?

Now for the main question. Is there a limit to how many tables a single site would allow a single account to play? Let's say you have 10 monitors where you can play 4 tables each without any overlap. You invite 4 friends over and you guys play 2 monitors (8 tables) a piece for a total of 40 tables. Would this be allowed for just one site?