SAP SSO (SNC) for ABAP - multi domain?

Hi everyone,

we are using SAP SSO (SNC) for ABAP to logon to a SAP System (B) via kerberos (conected with Domain (A) and in the internal LAN it's working fine. Now, we want to configure kerberos of the SAP System (B) to connect to furthermore Domain (C). We want to use both Domains to logon in the SAP System via SSO (SNC). Is this possible? and how? I think the parameter (snc/identity/as) in the rz10 is a problem or? If you have some ideas or a solution, it would be nice if you share this with me.

Domain (A)                    Domain (C)

        |                                   /           

        |      < SAP SSO >     /

        |                               /

          SAP System (B)

Thank you.