Can I safely log in from different IP addresses?

[kus]

It's not a problem: I frequently /camp one character and while it's counting down to zero, load another copy of the game and login (saves a little time, especially when I do ground transfers). If I'm a bit inattentive (habit, habit) and try to connect to the same server before I've fully camped, the game simply won't let me in. As soon as my character is camped, however, I can click the "Play Everquest!" button again. I'm inattentive/hasty often enough, but that has never created a problem for me.