Static Port Single Device

[gp-se]

Hello guys,
I'm new to pfsense, but I've been running it for a few months now without any major issues. What I want to do is have my PS4 using a static port, instead of randomizing it, which pfsense does by default. Most of the guides I have seen doesn't show how to do it for a single device, and I've had no luck getting just the PS4 to use a static port. Can someone provide me with a guide/instructions on how to have a single device on my LAN use a static port?

Thanks

-Shaun