GetTokenInformation returns same sid for different computers

Hi,

Iam using

LogonUser(
        L"user1", // usr name
        L"x", // domain
        L"xxx", // pass
        LOGON32_LOGON_NEW_CREDENTIALS,
        LOGON32_PROVIDER_DEFAULT,
        &handle
        );

and

GetTokenInformation(
         handle,         // handle to the access token
         TokenGroupsAndPrivileges,    // get information about the token's groups
         (LPVOID) ptg,   // pointer to TOKEN_GROUPS buffer
         dwLength,       // size of buffer
         &dwLength       // receives required buffer size
         ))

It returns same sid if i change user, pass and domain.