Howdy,
If you do not mind coding some PHP logic this should be very possible. Before uploading a picture to WP our plugin does apply the filter ‘tribe_fb_get_facebook_photo’. If you were to over-ride that filter so that it returns an empty result, the photo would not get uploaded. That would definitely disable the photo from getting imported. However, if you want to selectively import some photos from Facebook then you would have to wrap your overriding filter in some relevant logic.
Does that help you? Please let us know. Thanks!
– Brook