Hosting multiple socks proxies on a single server

Hosting multiple socks proxies on a single server

I have multiple public IP addresses assigned to a single NIC in a Windows
Server 2012.
I want to be able to use each IP as a socks proxy server which has to be
accessible from other Internet users. How can I do this?
Can a single socks proxy server software be able to host multiple IPs? Do
I need to install a virtual server for each IP? What is the maximum IP
addresses I can use like this in a single server/NIC?
Say I have the following public IP addresses:
212.216.34.1
212.216.34.2
212.216.34.3
212.216.34.4
...
212.216.34.255
What I want is the internet user to be able to connect to internet over
any of the above IP addresses like:
212.216.34.1:1234
212.216.34.2:1234
212.216.34.3:1234
212.216.34.4:1234
etc.
Which socks proxy server do you suggest for this, WinGate?