Thank you for the reply, Jay.
I think i have found a way to make it work.
I now give every job not only a company name (manpower), but also a category name (manpower).
I can’t sort on company name, but i can sort on category name.
[jobs categories=”manpower” ]
And this is the result: https://vacatures-heerlen.nl/manpower-2/
Only jobs with companyname Manpower appear ??
I think this will do for now. Thank you all for thinking with me.