How to disable "show all posts of this user"

I have been searching the forum for an answer to my question, but unfortunately have found no topic regarding my problem. So bere over with me, if a solution to my problem already exist in this forum.

I am trying to make different usergroups, where some usergroups are denied access to certain forums. This works well in the main forum, and people can only see what I intend them to see. My problems is that there is a way for a registrered user to see all topics posted by any member, when they access the members profile, and click on "show all posts of this user".
I dont want registrered members to be able to watch all posts another member from a different usergroup have postet. How do I disable the "show all posts of this user" option?

thanks in advance

They won't be able to see the post if they aren't in the usergroup and you have set up the right permissions in the Admin Panel>>General Tab>>Forums & Categoires>>Click on Modify on the section>>Permissions>>And uncheck view/read and write/reply>>Save

Thanks for the answer. When i checked the permissions, there was one place where i hadn't unchecked view/read.
Problem solved, and again thanks for the quick help