I'm glad to see you both want to play on our community's server, if you two want to make two separate master accounts you will have to contact TommyB or Alec. What they will do, they will change your MA's IP to a fake one. Once that is done, your brother can make an account and get accepted through the application process. Finally when both of you are accepted through application processes, you may start to play. I must stress that the first MA should not login till both accounts have been accepted through the application process.
I hope I helped, if you have anymore questions feel free to ask.