Sprinkle fillets with 1/4 teaspoon salt and 1/4 teaspoon pepper. Bring 4 cups of water just to a boil in a large nonstick skillet over medium heat. Reduce heat, and add fillets; cover and simmer 4 to 5 minutes or until fish flakes easily when tested with a fork. Remove fillets from skillet, using a slotted spatula, and place on a serving platter. Set aside; keep warm.
Coat a small nonstick skillet with cooking spray; place over medium-high heat until hot. Add shallots and garlic; saute 1 minute. Add wine, and cook until reduced by half. Stir in tomato, 2 tablespoons chives, lemon juice, 1/4 teaspoon salt, and white pepper. Spoon sauce evenly over salmon fillets, and serve immediately. Garnish with fresh chives, if desired.