perl and ldap at the same time??

Hello, I wonder if i can make a dual authentication check via freeradius. I am using rlm_perl right now for our accounting needs. What i want is to add LDAP auth. Ofcourse i can add this function to perl script that i write but, it is better to use freeradius ldap function. So, is it possible to check ldap if the username not accepted in rlm_perl? Or only one option can be used for authentication?