Hide Questions and Answers

Hello – I want to use this theme to have a private question and answer site for my network. Basically I want the person to be able to sign up for free – and post their situation with their debt. I need custom fields as well to show on the ask a question page.

I also want the ability to have a user type where these types of people can only answer or reply to the person asking the question/situation. Is this possible with this theme?