siteoptions.loggedinprofileviewaccess.html

<h3>Logged-in profile access</h3>
<p>Enable this option if you want to make sure all users can see each
others' profile pages.</p>
<p>If this option is unchecked, profile pages are initially viewable
by all logged-in users, but the owner is allowed to restrict access to
a smaller group if they wish.</p>
<p>Profiles of institution members will always be visible to other
members of the same institution.</p>