I do not know about the (new) outlier removal node from KNIME itself. There is a package “KNIME HCS Tools” that also has an outlier removal node that comes with some advanced options.
KNIME HCS Tools 3.1.101.v201604271109 de.mpicbg.tds.knime.hcstools.feature.feature.group Max Planck Institute of Molecular Cell Biology and Genetics (MPI-CBG)