As far as I know there is no specific training for a particular skill only. E.g. If you train JS for guards then a portion of that training also goes to Jump Range but to a lesser degree, if you train Inside Defense, then a lesser portion of that training goes to Shot Blocking, etc.
If what you mean is single position and double position training then it depends on how you want to shape you trainee. If your trainee has poor primaries but decent handling and driving then my opinion is it makes sense to train single position like Outside Defense, Jump Range or Passing for smaller players or Inside defense, Inside shot etc for your bigs. However, it also makes sense to create well-rounded players that can play multiple positions and dual position training with that.
Hope that helps. Happy Holidays!