How to load only lines with a specific ID from a file on an SFTP server?

I created a bat file that runs a WinSCP script to download a log file (response log) from a remote server.
The log file is explicitly loaded as is (responses from all requests).
How can I limit the download of a log file specific to my request? My request has a unique identifier. How can I truncate a response specific to my unique identifier?
The script in my bat file is below:

There's no way to do that using SFTP protocol.
You would need to use appropriate shell commands (if you have a shell access), like grep, using SSH terminal client.