My daughter will fly out of terminal C at 8:00pm. I fly out of Terminal B at 6:45pm. Both from Newark int. airport. We want to spend as much time together as possible. Is there any connections between terminals after security? Is there Fast Track through Security?
There is an airside shuttle bus between the terminals.
Between Terminals (United Airlines Connections)
United Airlines operates a shuttle bus between Terminals A and C from 5:00am to 10:00pm. In addition, United also operates a shuttle bus connecting Terminal B to Terminals A and C from 10:00am to 10:00pm. The shuttle bus is available at gate A28, B67, and C70 as illustrated in the image above. This service is free and you will not have to go through TSA security again. Please note this shuttle is operated at the sole responsibility of United Airlines and is subject to modification at their discretion.
The Airport has a service showing the security waiting times on the terminals in real time. There you can see that the TSA Precheck line is much faster than the general line, probably it's exactly what you mean with fast lane. You can learn more about the TSA Precheck line on their website