Optional
MapServer wants 1 filter per underlying WFS queryLayer, all included in parentheses QGIS-server wants 1 filter per underlying WFS queryLayer, each in its own in parentheses
MapServer: (......) QGIS-server: (...)(...)
QGIS-server does not filter on a WMS layer made from multiple underlying WFS queryLayers Solution: directly query the queryLayers
MapServer wants 1 filter per underlying WFS queryLayer, all included in parentheses QGIS-server wants 1 filter per underlying WFS queryLayer, each in its own in parentheses
MapServer: (... ... )
QGIS-server: (... )(... )