Unfortunately, not directly. WLED Interface in the browser or WLED app only work if the controller and the PC/smartphone are in the same local network. Secure direct control via the Internet is not possible. However, it is possible to install a home automation system (requires special hardware), such as Home Assistant or IoBroker. These have the ability to control WLED controllers and at the same time provide the options to access the systems via the Internet. Another option is to set up a VPN connection. Some modern routers support this. Then you first connect to your home network via the Internet (via secure VPN technology) and then you can access WLED as usual. Another simple but limited option is to pair WLED Controller with Alexa device (like Amazon Echo) if you have one. Then you can control the controller via the Alexa app, but only change on and off state as well as the brightness. Of course, you could theoretically enable direct access from the Internet to the WLED controller in the router. However, this is extremely insecure because the data is not protected in any way and anyone can control your controller in this way.