Switching to concrete windows with Openbox

This is a Lubuntu 16.04 running in live mode, that opens up at startup three windows (lxterminal, geany editor, and a graphic window). The user is intended to switch from the terminal to the editor and back, to command the system, and edit a file. The Nextwindow and PreviousWindow would make it, but the user has to avoid the graphic window. Is there any way to identify these windows and switch from one to the other by some keybinding?