Yes you can do it. The way I understand it is you simply make multiple ressies, apply the Dining Plan you wish to buy to the specific ressies, and then link all your ressies together through member services so you don't have to change rooms.
I plan on making 3 ressies on my next visit. A 1 day arrival day ressie, a 1 day departure day ressie, and third ressie for the middle section. I'll add the dining plan to the middle section only. Due to long flights, we always arrive late and depart early, so avoiding those extra dining credits we always have trouble using will be a big savings.