Hi Dan,
You can accomplish that by architecting a proper security model with SSO between BOBJ and HANA.
HANA posses a pretty robust security model that you can implement to secure you data, view models, packages and actions performed on hana, and by using SSO you can apply that security to users when they run the BOBJ content on top of hana with their username.
Keep in mind that at this stage there is still a way to go on that, so for your Reporting Landscape II would suggest to check the supported platform documents for SSO support against HANA from the BOBJ tools. For example, Analysis for Office doesn't support SSO OLAP connections against HANA.
Hope this helps, although I see your post is from February.
Cheers.
Christian.