Hi again
So i check all settings and noticed that i can set in acp only one fixed member id (topic starter announcement)
so privacy settings won't worked. Cause topic will be started always from the 1 same member, but not from an original user.
I think if user created contact us form, new topic on forum should be pasted under his username, than privacy settings will worked. Otherwise no.
But anyways better to create ticket system. Like it will be conversations in this module, so new topics won't be created. Just inside contact us system. Registered user will see pending requests, answered or closed status. So he can feel free to answer there or add something which he missed. Administartion or mods will receive pending requests and answer there.