Yes, it’s possible.

Go to a community’s or user’s page and in the upper right corner there are three dots, in that menu is an option to block.

Long-press the profile button in the toolbar.

There are solutions for Thunderbolt that allow connecting external graphics cards (eGPU) like this one from Razer, but the typical docks just forward the signal.

Edit: Updated link

My first idea was to use an USB-to-Ethernet adapter.