plugin to set category for next/previous post

Hey. I want a plugin that lets me determine what categories are shown in the next post/previous post aspect.

In usage, i'd like to have all the posts with the category 'main timeline' (or whatever) be the only posts that show up when doing next/previous post.

If I could set that 'per category' or 'per post' it would be even better; but for now the first part is fine.

thanks!