Theme modification for a portfolio site

Hi,

Am building a portfolio with the following structure.

1. Client wise page > Which will show all the types of works I did for them (I want to use posting method to add them.)

2. At the same time “Services wise” pages showing works only in a specific category lets say “web design”.

NOTE: I want to post works in the client pages. And I want to mention the category at that time for each post. So I can show the category wise page also.

Would really appreciate the help.