Restrict visibility of comments to registered members only

I seek a way to restrict visibility of comments to registered members only.  I use Paid Memberships Pro for membership admin as well as restricting access to posts / pages to specific membership groups.

Googling this issue, I find discussion on changing php files to show comments to logged-in members.  This option is well beyond my skill level 😉

Any chance of this 'feature' being an option in wpDiscuz - Wordpress  plugin?

Mahalo!