Wolf CMS includes among its core plugins a comments module. It includes several optional settings, including:
whether to auto-approve comments, or send them to a moderation queue
whether to use a simple “captcha” system (included)
whether to use the “Comments” tab in the admin to display the number of comments awaiting moderation.
Full details are given in the plugin's own documentation. This documentation can be accessed either from the Comments tab in the admin (created when the plugin is enabled), or from the plugins listing itself (again, this link will only be available once the plugin has been enabled).