Separate gateway for some PPPoE users needed

How can I route some pppoe users out of a different gateway than the rest. I see a ‘routes’ field in the PPP secrets screen, but can’t find any documentation about it.

from the AAA manual pages:

routes (text) - routes that appear on the server when the client is connected. The route format is: dst-address gateway metric (for example, 10.1.0.0/ 24 10.0.0.1 1). Several routes may be specified separated with commas

Edgars