Skyy

This plugin allows you to banned certain username from making comment, particularly when you don’t want to ban 
ip addresses, but want to stop certain “notorious” misbehaving users.
If your blog requires user registration, you should really try the “members.0.1.1” wordpress plugin.

WP-Ban-User

shawfactor

This plugin allows one to personalise content for a logged in user or emails for a email recipeient that is in the user database. It uses shortcode type functionality in any email, page, post, or custpm post type. It extract stored details of the viewer or reader. A default text can be specified for situations where there are no stored details.
This can allow you to offer a more customised service for example with a more helpful unsubscribe link. Or you could create your own “profile” page for logged in users only.
Check out <a href="https://github.com/shawfactor/lh-personalised-content" rel="nofollow ugc">our documentation</a> for more information.
All tickets for the project are being tracked on <a href="https://github.com/shawfactor/lh-login-page" rel="nofollow ugc">GitHub</a>.

LH Personalised Content

This plugin allows one to personalise wordpress emails, or content for a logged in user.

WP-Ban-User vs LH Personalised Content