C#: creating partial functions dynamicly

I have a 3rd party scripting engine contained in a session in my code. The engine takes any delegate and makes it available to it's script with the same signature.

Now i want to have plugins that provide these delegates for the engine, but I also want extra data from the session without it showing up in the script.

The script consuming the delegate should have no idea about the session, but the plugin implementing it does. The plugin writer should be free to use any number or types of arguments for the plugin delegates, so i need to do this dynamically at run time.

For example:

//from available plugin delegates
delegate bool SendMessage(Session info, string ip, int port, string message);
delegate void LogMessage(Session info, string message);

//to create script delegates
delegate bool SendMessage(string ip, int port, string message);
delegate void LogMessage(string message);

So when the script engine calls LogMessage("Test") it should invoke LogMessage(mysession, "Test") in the plugin.

I found information on curry for adding defaults to delegates and Reflection could create the delegates, but how can they be fit together to accomplish this?