Go here:
http://www.project1999.org/forums/forumdisplay.php?f=25
Click "New Thread"
Choose "IP Exemption" in the prefix drop down list. Make sure you include both your account and the other account's name, and the relationship of the other person you will be playing with.
Please be mindful that these are performed in batches, so it may take a few weeks to be set up.