Authentication method filtered by role

Is there a way to limit the authencation method used by someone, depending on the role? For example, an administrator should not be allowed to login in mooodle using Facebook authentication.

Is there a plugin that do this "authentication method filtering"? If not, is there an easy way to implement this functionality (for example, editing a function called by all the authentication method, after a correct login...).

I'm using moodle 2.7.

Thanks