Can I import by department or by Users OU?

[kirkfranklin-alameda]

When I run php artisan ldap:import users I get all 1200 LDAP accounts in our Active Directory.

Each department is its own OU, and each department also contains a Users OU.

How can I import people by department, or (preferably) import only records in the Users OU?

Tried without success:
php artisan ldap:import users --filter "(objectclass=person)"
php artisan ldap:import users --filter "(objectClass=organizationalPerson)"
php artisan ldap:import users --filter "(ou=City Clerk)"

This works:
php artisan ldap:import users --filter "(cn=Ashley Zieba)"