Exclusion with Multiple Categories?

Hi, your plugin seems pretty good so far.

What I’m trying to do is to enable this plugin on some products only. Products on this website will be uploaded via a CSV file, so I thought the solution would be to create a category called (for example): ‘Enquiry’. All products in this category should have the enquiry button instead of the ‘Buy Now’.

This works fine except that all products on this website will be in multiple categories, e.g. one product could be in these categories (for example):
Tops > Shirts
Gifts for Men
Enquiry

So, to summarise, my question is, is it possible to force the ‘Enquiry’ button for all products in a specific category, even if they are also in other categories.

Thanks in advance!