Installation
Get it on Atlassian market version
Step 1. Create a Delegated Field
Navigate to Custom Fields https://<YOUR_INSTANCE>.atlassian.net/secure/admin/ViewCustomFields.jspa
Click Create Custom
Select All
Search for Delegated and select the type DELEGETATED FIELD
Give it a name and finish the creation of the field. The field is smart and can be rendered as different types, this is done from the Project Settings page and can be done by project admins.