Without detailed information, including ORCA input and output files, input file for Multiwfn, and all commands you inputted in Multiwfn, I cannot easily answer this question.
Hello,
I'm having a problem with the dipole moments of my systems (those made up of a polymer and a drug in an anion, since they're in water). Using Orca version 5.0.1 optimization, I'm getting lower values than those calculated by Multiwfn. What causes this difference?