Example:
User Story assignee - John.
Subtask 1 assignee - Peter.
Subtask 2 assignee - Anna.
Subtask 3 assignee - Elon.
Main filter:
On my active Sprint Board, I want to see only User stories, without subtasks.
project = EL AND issuetype in (Story)
Quick Filters:
On my active Sprint Board, I want to see User Story Where the assignee is Peter (Current User).