Preheat grill to medium-high heat. Cut 4 pieces of aluminum foil twice the size of each fillet. Place each fillet on a piece of foil. Sprinkle fish evenly with salt and pepper. Top each with 1 tablespoon wine, 1 tablespoon butter, 2 teaspoons lemon juice, 1 teaspoon capers, and 1 teaspoon parsley. Wrap fish in foil Grill for 6 to minutes or until fish flakes easily when tested with a fork.