1. Setup the Banking Process in the Jira Cloud/Datacenter/server Instance. There you have to configure Project, Issuetype, Workflows, Field Configuration, Permissions, Priority, Project Role, Groups etc.
You can get any banking process from the internet.
2. Create 3 Projects Project A, B, C with the same permission scheme. Each Project has a separate Project Administrator and they need to manage their own project access.
As a project administrator, configure the following requirement:
1. Only User A Can access Project A
2. Only User B Can access Project B
3. Only User C Can access Project C.