Hello! It seems like you're looking for an app that can help you control the internet access of devices connected to your WiFi network. One popular app for Android devices that can achieve this is called "NetCut." NetCut allows you to see all the devices connected to your network and gives you the ability to cut off their internet access selectively.
Please note that controlling internet access of devices on your network without their permission may be îllégâl in some jurisdictions. Make sure to use such apps responsibly and with the consent of everyone involved. Let me know if you need more information or help with anything else!