The customer wants to run a single approval workflow against the web contents in a site according to the organization structure. But Assignments of Kaleo workflow only allows selection of Organization role as RoleSelectForKareoDesigner.png shows. Using a site with organization hierarchy and organization role is pretty common use case in Japan and this is really useful if this functionality is available out of box.
Assignments should allow users choosing both Organization (Org A, Org B e.g) and Organization role (manager) so that the workflow can identify a user belonging to a same organization role, but a different organization.
Assignments only allows to select Organization role out of box, but Organization. So the workflow need scripted assignment to identify organization somehow.