Is it possible to pair TCP and UDP streams?

I should have confessed my ignorance of load balancing scenarios and techniques. Not only do I need session persistence on the TCP connection, I also need packets of a companion UDP stream to be directed to the exact same server. What I am looking for is a a way to instruct the load balancer to locate a key identifier in the UDP packet, use it to identify an existing TCP stream and direct the UDP packet to the same server. If "match across" option does that, then it is my answer, but I was not able to come to that conclusion reading the description of match across.