The "Login Redirect" setting in the SCLogin module only applies to standard Joomla logins. Creating a separate instance of the SCLogin module would do what you're looking for in that case.
However, for social network authentications, we only have one setting for New User and Returning User Redirect which is applied to all social authentications. We don't have a way to do different redirects on different pages right now.
I hope that helps explain, even if that's not specifically what you were looking to hear.
Thanks,
Alex