plugins – Need help with Task assigning and rewarding as currency which withdrawable

I have created custom roles and registration forms by using ultimate member plugin.

  1. Mr. Y
  2. Mr. X

I’ve assigned Mr. Y to my purchasable services (I am using ez form calculator plugin for this).

Now the problem is with Mr. X
How to assign task which submit by Mr. Y to Mr. X?
How can Mr. X earn some rewards as real currency (lets say $5 which withdrawable by PayPal) by completing his task?