Add a set of Attributes for their AccountID in the RadConfigs table.
There is a short blurb on this in the FAQ at the back of the
RadiusNT docs as well:
http://www.iea-software.com/radiusnt/docs/#_Toc437082766
--Dale E. Reed Jr. Emerald and RadiusNT__________________________________________IEA Software, Inc. www.iea-software.com