Kendall Weaver

Comment Roles is a very simple plugin. The sole purpose is to provide users with the ability to filter comments based on the role of users who have contributed comments to any given post. This plugin is not meant to be used simply as is. Rather it’s expected that a site administrator will apply additional CSS rules to their child theme or to the CSS section of their theme or another plugin in order to to best integrate this plugin in their site. There is currently no additional functionality associated with this plugin.
This plugin does not work with Jetpack Comments. At present there are no plans to try and make it work with Jetpack based on how it functions. Perhaps this will change in the future, but for now I don’t anticipate anything different. 
Additionally, this plugin requires the permalink structure be changed from the default. Any other permalink structure will work fine.

Comment Roles

Allows filering of comments by user role. It adds checkboxes for each role above the comments allowing users to determing which comments to show.

Pitabas

NetTantra

This plugin asks the user to choose his role in the website during registration from a list of selected roles. It works with BuddyPress also. It provides an interface from where the admin can choose which roles to display during registration for the user to choose from.
<h4>About the Developer</h4>
This Plugin is developed by NetTantra Technologies – a team of open-source enthusiasts and WordPress experts. NetTantra designers and developers work relentlessly to bring code to life so that WordPress users don’t have to do the hard work.
For professional support, you can get in touch with the NetTantra Team at <a href="mailto:wordpress@nettantra.com" rel="nofollow ugc">wordpress@nettantra.com</a>

WP Roles at Registration

This plugin asks the user to choose his role in the website during registration from a list of selected roles. Works with BuddyPress also.

Comment Roles vs WP Roles at Registration