Guest or External Users of a Confluence site shouldn't view the details of other site users within the same organization

Today "Guest users" of a Confluence site can view the profile details (Name, Group path) of the other users part of different sites within the same organization.

Expected Behavior:

Guest users of one site shouldn't have access to view the profile details of the other site users.

Considering the security aspects, we as an enterprise would like to have this implemented. And for this reason, we had to separate the instances and deploy them as separate organizations. We have different sites/instances for different customers. So, each of these customers shouldn't view the details of our company users and the other company users.