Taken from the stickied thread
here:
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.
So just post the required info in the Petition forum. And wait. =) They recently stated that they did these in batches and it may take up to a couple weeks before they are processed.