uniquely identify someone walking (or jogging) by
Take a step back and try to be very clear and precise about what you want to do.
When I read the sentence above I think you want to tell if Jane ran past as opposed to John.
Is that really true or do you just want to know that somebody ran past?
RFID is only going to work if people carry tags.
You them seem to branch out into image recognition and an arduino is not going to do that.
An arduino will tell you if something has come close to your sensor but you are right it might be a deer not a person.