Using multiple authentication modules.

Hello everyone, I am trying to authenticate users using client certificates and when that is verified I intend to use perl module for checking other attributes and verify that from database. Till now I was trying to configure freeradius to do EAP-TLS and then execute the perl module(rlm_perl). Both of them work perfectly fine independently but I donot know if we can put them together. I believe I can do something similar(checking certificate using EAP and then execute a script) using exec-program-wait but considering its depricability and per thread overhead will like the rlm_perl. Any help is appreciated. Regards, Kumar Mrinal