All public schools in Virginia follow the same guidelines from the State Council of Higher Education for Virginia (www.schev.edu).
The simple answer, barring any unusual circumstances (like, your parents are moving to Virginia this summer or something) is: NO, you cannot establish Virginia residency on your own while a student. If you came to Virginia from out of state for education purposes, you basically maintain your OOS status for as long as you are a student.
The easiest way to establish in state residency is to take time off from school and work and live in the state while not taking any classes. You would have to start this 12 months before the date of the desired benefit (i.e., 12 months before applying for admission decisions, 12 months before the first day of class for tuition purposes, etc.).