No, as pfSense only sees encrypted traffic passing through it. It can't determine what's inside this encrypted packages and therefore it can't shape. You only could give higher or lower priority for all that vpn traffic with the shaper but not on different traffic inside the tunnel.
thanks for the reply.. I think I dont really need to shape -within- the tunnel traffic, I just want to ensure outbound/inbound TCP traffic on port 1194 (what I use for openvpn stuff) to have a higher priority than bulk traffic. whatever happens inside the tunnels pfsense doesnt need to know about in my case, i think.. so the traffic shaper should be able to help me somewhat