Logging for 2 instances of PostgreSQL

Good afternoon,

I have set up 2 instances of PostgreSQL 9.6 on the same Windows server.
I noticed when I ran initdb for the second instance that it did not
create a pg_log folder in the new cluster, and that all logging is going
to the pg_log folder in the original cluster.

Is it possible to have a separate log for the second instance in the new
cluster?

Thanks,
George