Running perl program

[LoKoRadius]

Hi guys,

       I'm new in this list and in the world Radius, and I aalready have doubts :-)

       I have this scenery:

       My Radius           Outside Radius              RAS
      -----------                    -----------                            ----------
     |     A      |                |   B       |                          |    C   |
      -----------                    -----------                            ----------

       C send a request to B that make a Proxy to A (my Radius) and then I need to AAA this request, but to validate this user, I need to run a perl script to check in my strange Database.
       Questions:
       1) is it possible freeradius receive a proxy radius request?
       2) Can "A" authenticate in this way?

       Thank you in advance
       Alex Falcão