wpriders

This plugin will help you categorize the comments on your blog posts.
If you are a food blogger, this plugin is very handy to sort the comments on your recipes, like, for example in “I have made this” and “I have not cooked this”.
You can configure the list of categories from the Settings->Comments Categories page. 
Besides the categories’ list, you can also customize basic look and feel of the comment filtering buttons.
In case the plugin is not working with your theme, please check the FAQ section for more info.
If you need support with this plugin or want to customize it, please submit your request here <a href="https://wpriders.com/contact-us" rel="nofollow ugc">https://wpriders.com/contact-us</a> 
We are not offering free support on wordpress.org

Comments Categories

Add categories for the post comments on your blog

a.ankit

This plugin allows administrators to disable comments on specific post categories.
This is a very basic plugin developed for a particular use case. If you have any feature suggestions then pls use the forums.
If you face any problem using the plugin please ask in the <a href="https://wordpress.org/support/plugin/disable-comments-on-post-categories/" rel="ugc">Forums</a>.
Here is the link to <a href="http://spoontalk.com/wordpress/documentation-for-disable-comments-on-post-categories-plugin/" rel="nofollow ugc">Documentation</a>.
<h3>Is it Multisite Compatible?</h3>
NO, Not yet. However if enough users request it, I might add it at a later stage.

Disable Comments on Post Categories

As the name suggest, the plugin allows administrator to disable comments on specific post categories.

Comments Categories vs Disable Comments on Post Categories