Description: Prevents non-registered commentators from using registered logins of site members or authors.
I will answer only on that page so that all users can benefit from the answer. So please come back to see the answer or subscribe to that page's post comments.
Oui, l'auteur est français. ("but alors... you are French?")
It is mentioned in the comments at the top of the main plugin file. However, please prefer comments on the plugin page (as indicated above) for all non-private matters.