Razer Sila Port Forwarding Limitation

Hello, I've ran into a limitation with the Razer Sila that I'd love to see a fix/change for... For port forwarding, it gives you the option to specify port forwarding for a single external IP, an external IP range, or allow all IPs to access the port. I'm currently wanting to allow/port forward RDP from 2 specific IPs, but they are massively far apart (142.x.x.x & 198.x.x.x) so a range would be a pretty awful option in terms of keeping security locked down. If I try to add 2 separate rules for the IPs, it won't allow me to do so, giving me a message saying the port if the same. Is there any chance of having this fixed/removing this limitation?