posting in different categories for a particular page..

I dont know what keywords should i use to find this plugin. May be some human mind can help me on this.. ?? heres what am trying to do

a homepage with my normal categories and posts in respective categories (this is what word press provides)already done.. solved

a new page created with its own categories (homepage categories not included) and i can post on that page as many times as i want just like i do for my main blog.

Please help me on this.. ill be grateful