public void sendPrivateMessage(String from, String to, String message) throws IOException
	{
		User user;
		for(Integer port : sc.getUserMap().keySet())
		{
			user = sc.getUser(port);
			if(user.getName().equals(to))
			{
				byteArray = ("MSG "+from+" "+from+": "+message).getBytes("UTF-8");
				sendPacket = new DatagramPacket(byteArray, byteArray.length, user.getIp(), user.getPortNr());
				sc.getUDPsocket().send(sendPacket);
				break;
			}
		}
	}