You need to petition for multiple ip request here.
http://www.project1999.com/forums/forumdisplay.php?f=25
http://www.project1999.com/forums/announcement.php?f=25
IP Exemption: This is for requesting to be exempt from the limit of 1 connection per IP Address. You may request exemption if you have more than 1 real person playing from the same IP. When posting for this, please include the account names of every person that will be playing from the same IP, as well as the identities / relations to those players, and please make sure that atleast one character has been created under each account. Please verify the spelling of each account you specify.