Comment Log (or clog) is a plugin that allows you to store a copy of a comment you make on another site. 
This is done through implementing the <a href="http://peopletab.com/restta.html" rel="nofollow ugc">RESTTA</a>-based cLog API. 
As long as the remote site supports the API, you can keep track of any comments you make. 
This plugin also allows those that comment on your blog to keep track of their comments. 
The full details about the cLog spec can be found <a href="http://peopletab.com/cLog.html" rel="nofollow ugc">HERE</a>
<h3>Version Log</h3>
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1.2 : Fixed a major bug, it should actually work properly now for the handful of people that use it 😀
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1.1 : Minor updates, you can select the page to display the comment log on from a dropdown now, and confirmed it working with 2.5
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1.0 : Initial version.
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Comment Log

Keep track of your comments on other sites using the cLog API.

Seth Alling

Up until recently, WordPress gave two options: You could either disable comments and trackbacks by default for all pages and posts, or you could have them active by default. In WordPress version 4.3, this finally changed so comments are always disabled on new pages.
While the new change makes it easier for many of the sites, it make it harder for people who need to get the reverse and enable comments on all pages, or if they need to change the default for a custom post type. This plugin allows you to choose whether comments are enabled or disabled by default on all new posts, pages and custom post types, while still giving the ability to individually enable comments on posts or pages.
Also, this plugin provides a way to quickly disable all comments or pingbacks for a specific custom post type. It directly interacts with your database to modify the status, so it is highly recommended that you backup your database first. There shouldn’t be any issues using this feature, but it’s always good to play it safe.
<a href="https://github.com/sethta/no-page-comment" title="No Page Comment Development on Github" rel="nofollow ugc">View No Page Comment Development on Github</a>
<a href="https://github.com/sethta/no-page-comment/issues" title="Report an Issue about No Page Comment on Github" rel="nofollow ugc">Please Report any Issues about No Page Comment on Github</a>
<a href="https://www.paypal.com/cgi-bin/webscr?cmd=_s-xclick&hosted_button_id=5WWP2EDSCAJR4" title="Donate to support the No Page Comment Plugin development" rel="nofollow ugc">Donate to Support No Page Comment Development</a>

No Page Comment

An admin interface to control the default comment and trackback settings on new posts, pages and custom post types.

Comment Log vs No Page Comment