1. Cook pasta according to package directions. Drain in a colander over a bowl. Reserve 1/4 cup pasta water.
2. Heat a large skillet over medium-high heat. Add oil to pan; swirl to coat. Add asparagus, 1/4 teaspoon salt, and 1/4 teaspoon pepper; sauté 6 minutes or until crisp-tender. Remove from heat. Add rind and juice; toss. Keep warm.
3. Melt butter in a medium saucepan over medium heat. Add vodka and garlic; cook 1 minute. Add cream cheese, stirring until smooth. Stir in milk, Parmesan cheese, remaining 1/2 teaspoon salt, and remaining 1/4 teaspoon pepper. Stir in reserved pasta water, pasta, and asparagus; toss to coat noodles. Sprinkle with chives.