Detect calling server-instance from service-method

Can i detect the calling server-instance within the called service-method (in Delphi). so that i know, from which server the call comes (TCP, HTTP, Namedpipes)

or another option, can i bind a service to a specific server?

You can use Receiving information about client on server-side snippet.
HTTP server supports IROHTTPTransport, TCP server supports IROTCPtransport, etc

hmm, partly usable. I need an info within the service method to make a decision to reject a call from specific clients for this method. for example from outer the own subnet.

this event is fired before service method is called so you can just raise exception here and service method won’t be called. also you can put here some data into session.