FVWM: Identify window by PID?

[Dr Rainer Woitok]

Greetings,

is there a way to identify a window by the PID of the process running in
it?  So I could do something along the lines of

   All (... <PID> ...) WarpToWindow 50 50

I didn't yet find a solution at

   https://www.fvwm.org/Archive/Manpages/fvwm.html

I know there is the "wmctrl", but I would prefer a solution within Fvwm.

Sincerely,
  Rainer