How to create a project in jira with multiple boards in such a way that the members of one board shall not access other boards and roadmap?
A board is a visualization of a filter. If you create a filter and you set it to private, and you create a board based on that filter, then no other but you, will have visibility on that board.
Create a simple kanban project and then to create additional boards follow this documentation https://support.atlassian.com/jira-software-cloud/docs/create-a-kanban-board-based-on-projects/
From the global navigation at the top of the page, select the search field (or press /) and select Go to all: Boards. Then select Create board in the upper right of the screen.
In the modal that pops up, choose Create a Kanban board.
Select whether to base your board on a new software project or one or more existing projects (you need the Browse Projects permission for both options).
Follow the prompts to set up your board.
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