You can freely create the taxonomy you want.
Please visit to the back end and move to the Listings -> Settings -> more Taxonomies.
Then create a name and slug for your desired taxonomies. And save.
You need to find the detail template.
This is the doc (click here).
And open the template.
Please find “Listing Post Meta” widget and Set up the Taxonomy you created earlier.
[Directory Manager Pro – Listing Types ]
Select the new taxonomy you created in Listings and create a category.