[pfSense Support] static NAT (1:1) via Radius

[Michael Michael]

Dear All,
I want to setup a NAT gateway (used for ADSL users that are assigned a Private 
IP address and are all terminated to us via an Ethernet connection with the 
Telco) that once logging into the Captive Portal, the user to be assigned a 
static NAT IP address via Radius. Is this feasible with pfsense? I haven't seen 
any documentation on Radius and NAT Addresses.
Regards,
Michael.