Is it possible in Drupal Commerce to have 2 price fields according to role?
Are you looking to have a different price depending on the role of the user? If you want to have a price based on user role then the Commerce Pricelist module can help with that.

From the module list


  Different prices for different roles or individual users
  
  Different prices for different quantities 
  
  Different prices based on order date (like a time-limited discount)