InvertDoorwaySockets.cs

using DunGen;
using UnityEngine;

public class InvertDoorwaySockets : MonoBehaviour
{
	private void Awake()
	{
		DoorwaySocket.CustomSocketConnectionDelegate += CanSocketsConnect;
	}

	private void OnDestroy()
	{
		DoorwaySocket.CustomSocketConnectionDelegate -= CanSocketsConnect;
	}

	private bool CanSocketsConnect(DoorwaySocket a, DoorwaySocket b)
	{
		return a != b;
	}
}

Thanks a lot for this!