/usr/include/KF5/KLDAP/kldap/ is in libkf5ldap-dev 15.12.3-0ubuntu1.
This file is owned by root:root, with mode 0o755.
..
/usr/include/KF5/KLDAP/kldap/ber.h
/usr/include/KF5/KLDAP/kldap/kldap_export.h
/usr/include/KF5/KLDAP/kldap/ldapattributeproxymodel.h
/usr/include/KF5/KLDAP/kldap/ldapconfigwidget.h
/usr/include/KF5/KLDAP/kldap/ldapconnection.h
/usr/include/KF5/KLDAP/kldap/ldapcontrol.h
/usr/include/KF5/KLDAP/kldap/ldapdefs.h
/usr/include/KF5/KLDAP/kldap/ldapdn.h
/usr/include/KF5/KLDAP/kldap/ldapmodel.h
/usr/include/KF5/KLDAP/kldap/ldapobject.h
/usr/include/KF5/KLDAP/kldap/ldapoperation.h
/usr/include/KF5/KLDAP/kldap/ldapsearch.h
/usr/include/KF5/KLDAP/kldap/ldapserver.h
/usr/include/KF5/KLDAP/kldap/ldapstructureproxymodel.h
/usr/include/KF5/KLDAP/kldap/ldapurl.h
/usr/include/KF5/KLDAP/kldap/ldif.h