appending to a proxy reply attribute

hi - i would like to achieve the following: * inspect the reply packet from a proxy target radius * if the reply contains "Framed-Route", for example Framed-Route = 195.40.42.96/30 83.67.214.162 1 then append a string to the value: Framed-Route = 195.40.42.96/30 83.67.214.162 1 n n 60 uk-ABC-001 * NOTE that the appended string depends on the realm/domain so possibilities are: for username a@ABC.com Framed-Route = 195.40.42.96/30 83.67.214.162 1 n n 60 uk-ABC-001 for username b@XYZ.com Framed-Route = 195.40.42.96/30 83.67.214.162 1 n n 60 uk-XYZ-001 how is this possible with freeradius 1.0.2? tariq