You can enable Instructors to setup their own PayPal email id for Commission payments, using two simple steps :
1. Create a New user field (WP Admin -> Users -> User field), preferably in the Instructor Field group. Note its name.
2. Go to WPLMS Options panel -> BuddyPress and enter this name in Instructor Paypal email field
Now, when your instructors fill in the paypal id here, you’ll see this email in the LMS -> Settings -> Pay commissions section.
Refer below video :
* Requires version 1.9.2 or above