"Using: Carrington Blog 2.2 theme "
Curent release is 2.3.1 you may want to upgrade especially if you're using latest WP (3.11)

The global idea is here :
http://carringtontheme.com/2009/08/the-post-context/

You can do that based on specific "context" . I use this for guest author for example :

http://velofun.fr/2011/04/19/lovelybike-effet-mary-poppins/

Hope this helps

Luc

Hamad

In my case the specific displys are based or
-author
-categorie
- tag

To have a design specific to a given author I create a
content/author-authorloginname.php
based on content-default.php

To have a design specific to a given category list page I create a
posts/cat-categoryslug.php
based on posts/posts-default.php

To have a design specific to a given tag list page I creat a
posts/tag-tagslug.php
based on posts/posts-default.php

and so on...

To see it in action look at this post :
http://velofun.fr/2011/04/19/lovelybike-effet-mary-poppins/

and now look at in in the posts listed in the home page
http://velofun.fr

Its a post with a specific display for this specific author

By the way to use this level of carrington functionality its better to create a child theme installation. Doing this if something goes wrong at least you can roll back to the default theme, and theme upgrade are less destructives

Luc