Assign Notifications - Are you able to add another Req. field to receive a notification?

Summary

Want to add another to the list of those that receive notifications

Content

Hi - 

I created 2 new fields within our reqs. where we will add an employee's name & email address.

I would like a notification to be sent to the person listed in this field (we will enter their email address in the field) when a candidate reaches a specific req. status.

Under "Assign Notifications" is there a way to add another field to the existing list so a notification is sent automatically to the email listed in the new field?  (right now it's Candidate, Requisition Hiring Manager, Requisition Recruiter, etc.)