Collaborating between different backlogs?

Is there a smart way to collaborate between different backlogs of the same project?
I have some user stories that are part of one backlog that also include some requirements of another backlog. Is there a way to make sure that these user stories are showing up in different backlogs? So far what I do is that I duplicate the user stories and I link them together. Does anyone known a smarter way to do this?