Creating a custom plugin based on Author Category plugin

My site is avelim.co.il. The site is on Hebrew wordpress 3.3.2, using the theme Weaver 2.2.6 with many customization done by programmers. The Author Category plugin This plugin allows you to select specific category per user and all of that users posts will be posted in that category only. [login to view URL] I want than when I assign a category to a user they will be additional consequences: a. In posts, the user will only be able to see in the dashboard the posts from his assigned category. b. That user's dashboard will not show the comment section in the wordpress dashboard For this, I need a custom plugin built, based on the Author Category plugin . The freelancer should send me the plugin as a zip file which I will install on test site. When the plugin is working properly, I will install it on a live site. The work should be done in 24 hours after being awarded the project. Freelancer should allow 7 days for testing after he finishes his work, before getting paid.