No. If you want a more structured output, consider using XML logging. And you can re-format the log any way you like.
Before posting, please read how to report bug or request support effectively.
Bug reports without an attached log file are usually useless.
winscp.comis executed from a batch file, and the output is redirected to a file (hence not using log option), a few header lines are shown in the file, related to the "connection" phase before the "actual commands" output:
Connecting to x.x.x.x.:990 ...
TLS connection established. Waiting for welcome message...
Starting the session...
Active session:  firstname.lastname@example.org
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