No, three fields is the current limit:
P.S. Same holds true for JIRA Software:
I have made a work around solution for this using "Automation for Jira", it could be made in scriptrunner as well
I have made a custom filed "card information 1".
When saving the Epic (in this case) I update the field with values from 3 different fields e.g. Fix version, pending reason
Not the greatest solution, but it works and my uesers are happy :-)