What kind of tracing are you interested in?
You can perform HTTP logging by specifying an HTTP root log file name in the Console Settings Page along with a "file change frequency".
In build 1.3.28, we have added a Task.HttpURL variable, which you can both read and write in any SurferScript text expression, such as:
<!-- Save the current URL in the LastURL variable -->
The latest/best build of 1.3.28 is at: ftp://ftp.ieinc2.com/pub/surfer/T1_3_28T.zip.