Re: Anonymizing Forum Users
I believe there is a 'post as anonymous' feature which must be enabled via the control panel: doing this will let a logged in user post as anonymous by checking a box every time. I am not sure if Admins can see who actually posted the message in the forum if the post as anonymous option is used.
A simple (but not very foolproof) solution would be to use css to make invisible the author in the list of messages of the forum. This is not foolproof because the name of the client who posted the message can be seen by viewing the HTML source, if anyone cares to do so.
The correct way to use TikiWiki to address your requirements would be to create a tracker, get clients to enter their reviews and use PrettyTracker templates to control exactly which fields other clients can see. It would be trivial for you to set this up yourself or you could hire a tiki consultant: see https://tiki.org/Consultants
;){kind=link}
;){kind=link}