One of our users does not want to see everyone's comments except friends on his wall. What are the options that users have to restrict what they see on their wall.

The user can go to My Settings > Journal Features > Add Comments friends. This will only affect their own profile, not the summary view though.

Thanks Ben for your speedy response. So there is no way for user to control the posts showing on his wall?

The user can control what displays on their own profile, just not what displays on the Summary. Aside from clicking the summary filter buttons that is.