how i can match the number that is calling to me

Hello I am new with freeradius ,I wan to know if is posible to restrict an acces to the network using the telelephon number of who is calling for the acces to the network by the ppp conection How I can use radius for match user password and telephone number combination as conditions for acces to my network I will be very grateful if somebody can help me -- Este mensaje le ha llegado mediante el servicio de correo electronico que ofrece Infomed para respaldar el cumplimiento de las misiones del Sistema Nacional de Salud. La persona que envia este correo asume el compromiso de usar el servicio a tales fines y cumplir con las regulaciones establecidas Infomed: http://www.sld.cu/