Identify if the request is initiated from Okta IDP (ASP .NET MVC App)

I have a .NET MVC App where I want to add OKTA as an IDP. I have used the WS-Fed Okta template to configure the App with Okta. Here, we can either initiate the request from the SP or the IDP (Okta dashboard). Assuming that I send a request from Okta, is there any to programatically identify that the request has come from Okta Dashboard. I am using WS-Federation protocol for authentication and WIF framework