The network provider can be configured to have different behavior depending on the domain that the user logs into. These settings are only relevant when using integrated login. A domain refers to an Active Directory (AD) domain, a trusted Kerberos (non-AD) realm or the local machine (i.e. local account logins). The domain name that is used for selecting the domain would be the domain that is passed into the NPLogonNotify function of the network provider.
Domain specific registry keys are: