Yes, you can enter the ballot as a group of any size. All group members will be accepted or rejected so you don't end up in a situation where your friend, family, or partner gets in and you don't.
1. Select the 'group ballot entry' option on the ballot registration page
2. Enter a group name and choose 'Add Another Ballot' at the bottom of the page
3. Choose 'group ballot entry' again for Registrant 2 and enter details of the 2nd group member
4. Add the ballot entry to the group that you created
Continue to 'add another ballot' and register group members until your group is complete!