comet poe and hdmi and setup help needed

ok i have not tried using comet poe yet its on its way but how do i connect comet and still have my monitor connected to the computer i want to control with only 1 hdmi port on the computer and the monitor(tv) its normally connected to only has hdmi as well on it? ie i want to use it remotely but also locally when i am in same room its in if that makes sense? Do i need more hardware to do this or? Thanks in advance!