I have a content type where users can post reviews or comments. 
I want to achieve this with the comment module and not by creating another content type and using node reference.

**So I want to limit the number of comment a user can post per node for a specific type of content type.**

Again I also have other content types where I have given the users the option of commenting on article, and that can have multiple comments and replies.

Can anyone suggest me how to achieve this? 

Can I do it through rules(I haven't tried yet)?

I am using Drupal 7