Raritan Computer DKX416 - Manual (Page 186)

Remote Authentication
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9. Click OK.
Returning User Group Information via RADIUS
When a RADIUS authentication attempt succeeds, the device determines
the permissions for a given user based on the permissions of the user's
group.
Your remote RADIUS server can provide these user group names by
returning an attribute, implemented as a RADIUS FILTER-ID. The
FILTER-ID should be formatted as follows:
• Raritan:G{GROUP_NAME}
where GROUP_NAME is a string, denoting the name of the group to
which the user belongs.