Hi!
The feature is under construction, as some back-end settings changes have to be implemented first. I know that some search plugins offer conditional filters, but in most casses there is a terrible performance caveat when the posts number rises – usually only examples with a very few products are shown for that reason, and we want to make sure this works correctly even on a higher post count.
That being said I don’t know the expected date on this, but it’s a very high priority feature, so it’s definitely coming as soon as possible.