prsnippet.java

//FROM gameserver/server.jar!/l2/gameserver/network/l2/c2s/CharacterSelected.class
protected void runImpl() {
  //...
if (Config.ALT_LIMIT_HWID_WINDOW != 0 && !StringUtils.isEmpty(var1.getHwid())) {
  //You could simple check if the account is premium and byypass here...
                        int hwidCount = 0;
                        Iterator AllPlayers = GameObjectsStorage.getAllPlayersForIterate().iterator();

                        while(AllPlayers.hasNext()) {
                            Player tPlayer = (Player)AllPlayers.next();
                            if (tPlayer != null && !tPlayer.isLogoutStarted()) {
                                GameClient tGClient = tPlayer.getNetConnection();
                                
                              //Or....
                                //ByPass premium from window verification, or check if the bonus service allows to bypass, or window extra counting, something else
                                //Some configs could be implemented
                                if(!tPlayer.isPremiumWindow()){ //TODO: Implement on Player Class the method isPremiumWindow() bool or someting else as did on startBonusTask method
                                  if (tGClient != null && tGClient.isConnected() && StringUtils.equals(PlayerGameClient.getHwid(), tGClient.getHwid())) {
                                      ++hwidCount;
                                  }
                                }
                            }
                        }

                        if (hwidCount >= Config.ALT_LIMIT_HWID_WINDOW) {
                            this.sendPacket(new ExShowScreenMessage("The number of windows is limited by " + Config.ALT_LIMIT_HWID_WINDOW + " HWID", 10000, ScreenMessageAlign.TOP_CENTER, true));
                            this.sendPacket(ActionFail.STATIC);
                            return;
                        }
                    }
  
  //..