Hi,
sorry for late reply, it was a weekend
This is not possible without Social Network plugin, anyway this is easily manageable with a very simple plugin:
- Create a Usergroup called "Private Group" (child of Public usergroup)
- Create a field called "Profile Type" of type Radio with 2 options
1|Public
2|Private
- Add condition to the new field like: If equal to custom value 2 then add to usergroup "Private Group" (Inverse: Yes)
- Download and install attached plugin
- Go to Extensions->Plugins and search for "Private Profile" plugin
- Enable the plugin and check options to set the private usergroup to "Private Group"