Phpfox customization

I require these two features modified in phpfox social networking system I will purchase: 1. User can create circles and add friends to the circles (as in Google+), and when posting he can decide on each post which circles he wants to share the post with. Circles and their members are private to each user and not visible to all users. 2. Admin can create "Lists" and add users to them, and also any user can join any list, and when posting the user can decide on each post which lists he wants to share the post with. Lists are public. Please do not send copy&paste messages with irrelevant information, they will be ignored.