How does Jira auto-assign tasks from one project to one group, and from another group to another project?

Question

JIRA

How does Jira auto-assign tasks from one project to one group, and from another group to another project?
Auto-assign as follows:
Project A -> Group 1.
Project B -> Group 2.

Answer 1

1. A field is created - multi group picker
2. A default group is set
3. Notification scheme is configured