Yes you can control who can comment.
To control who can comment:
Login to your Club Control Panel.
Click the Settings tab.
Click Comments in the left side menu.
Go to the Allow Comments drop down box. Choose Yes to enable comments or choose No to disable comments.
Go to the Who can comment? drop down box. Choose Everyone this means users do not need to be a member of your club website to comment.
Or choose Authorised website members only to restrict comments to authorised club members only.
Click Save settings.