In mc2skos 0.11.0 this is ignored. The documentation says "$4 must precede $0 (since both subfields can be repeated)" but this is not true. I found a related bug in the code but it will only work if URIs are preferred when subfield $0 (and/or $4) is repeated. This will work (subfields to be ignored commented out):
The GND record https://d-nb.info/040034232/about/marcxml contains field 550 with multiple $0 and $4 which are interpreted differently:
In mc2skos 0.11.0 this is ignored. The documentation says "$4 must precede $0 (since both subfields can be repeated)" but this is not true. I found a related bug in the code but it will only work if URIs are preferred when subfield $0 (and/or $4) is repeated. This will work (subfields to be ignored commented out):