[Observium] multiple authentication mechanisms at the same time for observium?

I'm running the current stable release. A question came up today about authentication, basically is it possible to have accounts authenticated via mysql AND have other accounts authenticated via radius?

i.e. I want to have some local/mysql accounts on the system but have the general major population authenticated via radius.

Was thinking something of a lookup process to check to see if a user is local first and if they don't exist then continue down to the next authentication mechanism.

Steve