On forum front-end you can see all members. This page is available under Members menu. This is a simple list of members with quick profile information, such as avatar, display name, posts, reputation, join date, etc…
You can put Members menu item in all WordPress menus using Members Menu shortcode-url.
If you don’t want to show members to guests or to other Usergroups, you should edit the Usergroup in Dashboard > Forums > Usergroup admin page and uncheck/disable the first or both CAN‘s (permissions):
- Front – Can view members
- Front – Can view profiles