IP Pool

Hi folks, I have a PPPoE server which authenticates the user on freeradius... Right now, the PPPoE server is in charge of assigning the IPs to the users but I want to do that via radius because I'm adding another PPPoE server on the network and OSPF routing... Problem is, I had a look on radiusd.conf and what I could understand is that I can only have pools on a same network (like 192.168.0.0/23, for instance)... But I need 1 big pool with IPs in different networks because my users receive valid public IP addresses... So, I need all users on the same pool and the pool has to have a bunch of differente IP ranges, not in order, like 200.200.200.0/24, 201.10.20.0/24 and so on... Is that even possible? -- Marcelus Trojahn