Someone sells software used to keep track of rentals. Now, the proper category would be /Computers/Software/Industry-Specific/ - and some competitors are there. However, that category is closed.
No subcategory fits exactly. Most of the customers are in the construction business, which has a subcategory, but the software is can be used for other rentals as well, such as audio/video, party, etc, etc.
What should he do? Is there a way to get the submission accepted for the root category? Or should he just submit to Construction? Or is there a way to submit to every category for which the software is relevant?
Both replies so fare make some sense (except that the parent categories of a closed category are typically closed as well). If you are unsuccessful in asking an editor in /Computers/Software/, then you should look for another place.
The fact that you can't find a suitable subcat below Industry-Specific could really mean that your software actually isn't specific to any single industry ;) . Maybe you want to have a look at /Computers/Software/Business/, and consider if getting listed in that area would be an acceptable alternative.