Asp.net Identity OwinContext FacebookAuthentication for multiple domain site

Question

我有一个网站有多个域名。 例如example.com，example.fr链接到一个asp.net mvc站点。 我需要为多个域名站点配置asp.net身份FacebookAuthentication。 像这样的东西

var facebookAuthenticationOptionsCom = new FacebookAuthenticationOptions()
{

AppId = // appid for example.com
AppSecret = // appid for .com
AuthenticationType = "facebook",
SignInAsAuthenticationType = "ExternalCookie",
//Domain = ".com"
};

var facebookAuthenticationOptionsFr = new FacebookAuthenticationOptions()
{

AppId = // appid for example.fr
AppSecret = // appid for example.fr
AuthenticationType = "facebook",
//Domain = ".fr"
};


app.UseFacebookAuthentication(facebookAuthenticationOptionsCom);
app.UseFacebookAuthentication(facebookAuthenticationOptionsFr);

有什么解决方案吗？ 感谢。