I looked at it and while it looks good on face value b/c it looks like I "could" do the following:
Close-NcCifsSession -Node * -VserverContext MYVSERVER -Address 10.x.yy.zzz -WindowsUser mydomain\myuser
the cmdlet wants me to define the SessionID (since we're on CDoT 9.1), which makes this infinitely more complicated. I want to clear all connections for a specific domain user. We don't care about the SessionID.