1. Preheat grill to medium-high heat.
2. Combine 2 teaspoons lime juice, 1 tablespoon oil, and pork in a zip-top plastic bag; seal. Marinate 10 minutes at room temperature. Remove pork from bag; discard marinade. Sprinkle both sides of pork with 1/2 teaspoon salt, cumin, pepper, and garlic. Place pork on a grill rack coated with cooking spray; grill 3 minutes on each side or until desired degree of doneness. Let stand 5 minutes. Slice pork into thin strips.
3. Lightly coat corn with cooking spray. Place corn on a grill rack coated with cooking spray; grill 6 minutes or until lightly charred, turning occasionally. Let corn stand 5 minutes; cut kernels from cob. Combine kernels, 2 teaspoons juice, remaining 1 1/2 teaspoons oil, remaining 1/4 teaspoon salt, bell pepper, and next 3 ingredients (through jalapeño) in a bowl; toss.
4. Place tortillas on a grill rack coated with cooking spray, and grill for 1 minute on each side or until lightly browned. Toss cabbage with remaining 2 teaspoons lime juice. Place 2 tortillas on each of 4 plates, and divide pork evenly among tortillas. Top each taco with about 1 tablespoon cabbage mixture and about 2 tablespoons salsa.