When an administrator posts and order, they can put a lable on the post designating the city of origin for the orders. That way if you only want to pull up orders or posts related to your city, you can click on the lable "Iowa City" or "Roanoke" or whatever and only posts with that lable will pop up.
For example, this post has the lable "Admin" so that if you only want to see posts designated as "rule" type things or announcements relating to everyone using the blog, you can do that.
I put a list of lable links on the side bar, which should make concentrating on things that interest you and avoiding things that don't a lot easier. If you're an Administrator and you create a new lable link, go ahead and add it in the lable links section of the template.
If you're not comfortable editing html, let me know what the lable link is and I'll add it for ya.
If there is interest, I'll go back and add lables to old posts, I've only gone back to October so far, but it isn't any trouble other than the time it takes to add the lables to old posts.