Forum Moderators: open
There are some instances in which a site might be listed in ODP in both a subject category and a regional category, such as a site about a professional sports team, or a business site where the company info shows it is located somewhere.
If your site is relevant for more than one category you can submit in the appropriate ones and have more than one listing.
You might also want to read Laisha's article [dmoz.org] about deeplinking.