Allow vendors to create or use subcategories?

Hi there,

I've got Hikamarket set up to create a category for each vendor, and I'm using MyMaps to allow geo search.

That all works great, BUT I'd like to be able to split up products on vendor pages by category.

Is it possible to allow vendors to create or use subcategories but still have their products show on their page, and if so, how?

Also, what are the options to organise categories on their page if it is possible? So if I wanted to have a submenu that appears on their page with their categories, could I do something like that?

Hi,
I've tried to set this up so that vendors can create categories, but I can't figure it out.
I've attached screenshots of the config pages and the access page, as well as the dashboard on the site. As you can see, there's no menu option for categories for them.
How do I do this? If you could give me step-by-step instructions to allow vendors to create subcategories but not see any of the other categories on the site? If there's an article explaining this, that will work too.
I just need to know what the settings required are, though.