I have a plog page that is filtered by one category (Other blog pages are filtered by other categories).  I want to filter the tag cloud widget (this is the standard one that comes with the theme) by the same category so that it displays only tags associated with the blogs on this page. How do i do that?

Also I want the results to be returned within the same page so that the styling is consistent.

Finally I want the search to be restricted for only posts within the page, i.e., the filtered by category posts.