Hi,
Unfortunately there is not option for that, this is definitely a custom coding territory.
I don’t think it should be that difficult, if you only want to simply hide or only show results based on purchases. (without showing an actual filter button or anything)
I think getting the purchased product IDs and then passing them to the ‘post_not_in’ or the ‘post_in’ query arguments will limit the results based on your requirements.
I think that any decent developer should be able to help you with that. If wpkraken is not available, you can look on Envato studio as well: https://studio.envato.com/