Boards don't belong to projects, so no, you can't restrict them by project.
You can change the projects though, so that issues are restricted or even hidden - if a user can't see/edit/an issue because of the project settings, the same occurs on the board.
Connect with like-minded Atlassian users at free events near you!Find a group
Connect with like-minded Atlassian users at free events near you!
Unfortunately there are no AUG chapters near you at the moment.Start an AUG
We're bringing product updates and pro tips on teamwork to ten cities around the world.Save your spot