Port forward but keep destination IP

[bavism]

I want to setup a firewall rule so that all outgoing connections from a certain LAN host with a certain destination port get changed to a different destination port. I could do this with a Port Forward rule on the LAN interface if I was not forced to set the Redirect Target IP (or I could set it to the equivalent of "original destination IP"). Is it possible to setup such a rule?

[dseven]

I don't think there's any way to do that with OPNsense. I'm curious what the use-case would be?