Exporting Dashboards

I have been asked to create a way that a small group of users can see Dashboards for only their partitions. I have successfully created the custom dashboard for them, but cannot limit there access to just that tab in the UI. I am looking at exporting the charts to something like SharePoint, but would like to have them updating automatically. Has anyone else faced a similar challenge? If so, how does one go about presenting only certain Dashboards to specific users?