How to dump only particular tables from particular schemas
pg_dump \
--file=/path/to/dump/file.dump \
--format=custom \
--ignore-version \
--table=myschema.mytable \
--table=myschema.myothertable \
--table=myotherschema.mythirdtable \
--no-owner \
--verbose \
--no-privileges \
-U user -h myhost mydatabase