Hi!
If I’m guessing correctly you only want to return the pages from the same category as the currently displayed page is in.
In that case something like this could do the trick:
This will get the current post/page categories and push them to the query arguments.
In case you have posts/pages which are uncategorized, you might want to turn OFF an option to exclude them as well: http://i.imgur.com/Rnuslom.png
