Can you separate airdropped photos from someone else's iPhone from your own photos?

I was on vacation with some friends and we both took photos of the trip on our iPhones. At the end of the trip my friend airdropped all of her photos onto my iPhone. Now all the photos are randomly mixed together (not chronologically) and everything is unorganized and not sorted in a logical manner. I would like to separate out her photos into one album so that they will appear chronologically separate for each iPhone. Hope this makes sense. When I brought the photos onto my iMac the metadata says that the source for all the photos was my personal iPhone, it doesn't show that some photos originated from someone else's phone so I can't figure out how to separate them unless I do it manually. Any recommendations would be helpful.