I may suggest you use the "Display comment form for post IDs" option. So you can create as many comment forms as you like, then just use the current post ID to link the post with the comment form with certain settings. 

In case you want to add the comment form directly from the post/page editing screen I may suggest you contact our custom development service.

We have plugin customization and custom addon development services at the gVectors Team. They can assess the work and create it for you. Just contact us via salesgvectors.com email address and send a list of requirements you'd like to have.  

I'm using wpDiscuz along with MemberPress plugin, but it seams they are not compatible as I can't hide comments of hidden articles. I mean, different kind of access to different kind of articles. I'd like to show comments only to those they have the permission to do that. But it doesn't work.

I just can set general role permission on wpDiscuz settings, and hiding or showing comments to specific user roles. But it's not what I need. I've articles with comments that anybody should read, and I've articles with comments that only paid members should read.

Is there a way to solve this issue by your side? 

For example, it would be possible to select the comment form for each article, directly from the article editing page? In this way it would be sufficient to create different forms with different viewing permissions, and use them as needed depending on the article.

Thank you,

Alice