OpenVPN client override with multiple possible IPs

[efny]

I would appreciate someone more knowledgeable clarifying something for me.

I have OpenVPN clients authenticating to a RADIUS server. However, I may have more than one device per user authenticating against the server. I initially set up client overrides to have predictable IPs on a per-client basis. However, this creates routing issues when the same user tries to open more than one session, resulting in regular connection interruptions.

Is there a way to specify an IP range with the ifconfig command in client override or multiple command lines, or do I need to abandon the idea of overrides for clients that will log in more than one device at a time?

Thanks in advance!