Feature Request: Show taskbar on multiple, but not all displays. (I.e. select individual displays)

I don't plan to implement it in 7+ Taskbar Tweaker at this time, but I can say that it's not difficult to implement.

I don't know if there's an available tool that will allow to hide the desired taskbar automatically, but e.g. there's WinLister which allows you to do it manually:

https://www.nirsoft.net/utils/winlister.html

Look for windows with the following class name: Shell_SecondaryTrayWnd.