I don't think we have any way exposed to do this right now, but I wouldn't be opposed to a patch that added this

On Friday, February 12, 2016, Aqs Younas <aqsyounas@gmail.com> wrote:
Hi, 

I am bridging Invite containing both RPID and PID to some destination. Like

 <action application="bridge" data="{sip_cid_type=rpid,origination_caller_id_name=_undef_}sofia/external/${sip_req_uri};${sip_req_params};fs_path=sip:${Dest}"/>

Currently, I see freeswitch can add only one header PID or RPID but not both with  sip_cid_type variable.

How can i Add both?

Remote-Party-ID: <sip:14248271614@192.168.10.25>;privacy=off;screen=yes
P-Asserted-Identity: <sip:14248271614@192.168.10.25;user=phone>

Any suggestion is much appreciate. 

Best Regards.