Simple answer; Yes. You can have multiple accounts.

If you are talking about the game then its alright. People have like 50 accounts playing the game. their whole family sometimes even play. Be it the same computer or different computer around the house.

If you are talking about this website its also fine to have multiple accounts if you are different people. There are even some people who make new accounts because they don't want to use their old account or forget password. some might be Admins who want an account for work and another for personal.
But I advice that you do make 1 account per person please. If you are different people I see no reason why you cannot have different accounts. If you do not post much after a while your account my be purged.

and if you are talking about the Igg forum that's also allowed as well because you use the log in of your character and some people have like I said 50 characters.