From looking at the manual for the DI-524, it looks like you can do this by using the Virtual Server configuration page. You would give your rule a name and specify the private IP address as 192.168.2.110. The public port would be 43011 and the private port would be 5130.
I have tried it before, I can create the first one, private IP 192.168.1.110, private port 5130, public port 43011. but when I try to create the second one, private IP 192.168.1.115, private port 5130, public port 43015. I get a port range conflict error.