/usr/include/KF5/ is in libkf5identitymanagement-dev 17.12.3-0ubuntu1.
This file is owned by root:root, with mode 0o755.
..
/usr/include/KF5/KIdentityManagement/
/usr/include/KF5/KIdentityManagement/KIdentityManagement/
/usr/include/KF5/KIdentityManagement/KIdentityManagement/Identity
/usr/include/KF5/KIdentityManagement/KIdentityManagement/IdentityCombo
/usr/include/KF5/KIdentityManagement/KIdentityManagement/IdentityManager
/usr/include/KF5/KIdentityManagement/KIdentityManagement/Signature
/usr/include/KF5/KIdentityManagement/KIdentityManagement/SignatureConfigurator
/usr/include/KF5/KIdentityManagement/KIdentityManagement/Utils
/usr/include/KF5/KIdentityManagement/kidentitymanagement/
/usr/include/KF5/KIdentityManagement/kidentitymanagement/identity.h
/usr/include/KF5/KIdentityManagement/kidentitymanagement/identitycombo.h
/usr/include/KF5/KIdentityManagement/kidentitymanagement/identitymanager.h
/usr/include/KF5/KIdentityManagement/kidentitymanagement/kidentitymanagement_export.h
/usr/include/KF5/KIdentityManagement/kidentitymanagement/signature.h
/usr/include/KF5/KIdentityManagement/kidentitymanagement/signatureconfigurator.h
/usr/include/KF5/KIdentityManagement/kidentitymanagement/utils.h
/usr/include/KF5/kidentitymanagement_version.h