Combine cream cheese, sour cream, lemon juice, horseradish, garlic powder, onion powder, pepper, and salmon in a food processor. Pulse until fully combined, then carefully fold in the dill.
8 ounces cream cheese, ½ cup sour cream, 1 Tablespoon lemon juice, 2 teaspoon horseradish , ½ teaspoon garlic powder, ½ teaspoon onion powder, ¼ teaspoon black pepper, 4 ounces smoked salmon, 2 Tablespoons chopped fresh dill