Netweaver SSO with different user id's

Hi All,

In our case the Network/portal user id is different from HR system user id and these 2 user id's are different from the FI system user id.

Current the FI system is outside SSO as we can only have 2 user id's in the logon ticket.

Can NW SSO 2.0 help in this case(3 different SAP ID's), to enable SSO between the 3 different systems.

I can see a line in the SSO 2.0 master guide saying "Can be used for SSO even with different user id's", but can't see how. Can you please help me understand if SSO 2.0 would help in my case.

Thanks,

Anand