In PPPoE mode, technically you can only connect to your modem via 1 PC and not more. If you don’t want to do so, you can use mobile mode with a dedicated PC/laptop to use the bot. Mobile mode will use your sim-card internet and you won’t need to change anything in your router.
New: if you are using fritzbox modems, you won’t even need to connect your computer to the router via LAN. Also, you don’t need to configure your modem for PPPoE mode. So, you can use the software on the PCs that are connected to the same router.
Full guide: IP Changing Methods: PPPoE / Fritzbox bridge mode on docs.dalga.dev
