I might misunderstood but are you dual boxing with your own account and your friends account?

If you are and get caught you most likley will get a ban.

Some tips is like with frost nova and key clone you can use a "round robin" feature that only press one client at a time..

So when you press "2" once mage 1 will use frost nova and when you press it again mage 2 will use frost nova!