It would be fair to suggest they need a higher intake of protein (and carbs) than the sedentary group because of muscle wear and breakdown during those long runs.
Actually the protein requirements between the average person and an extreme athlete is minimal. The average person can only utilize about 3 ounces or 90 grams of protein daily. Anything above that actually becomes "toxic waste" to the body as it breaks down forming ammonia. Endurance athletes only require about an extra half an ounce of protein daily over the average person.
Taking excess protein does not build more muscle as some people believe.