[FreeNX-kNX] "proxied" connections to other hosts running X and NX impossible?

[Tomasz Chmielewski]

Whether I use kNX or NoMachine nxclient, it is possible to do a "proxy" 
connection either to a VNC session or Windows Terminal session.

However, it's not possible to do so with UNIX/Custom.

Why is it so?

I have a setup like that:

1) "Workstation with NX client"
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2) "Free NX / proxy"
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3) "Free NX Servers / VNCWorkstations".


I don't have a direct connection between 1) "Workstation with NX client" 
and 3) "Free NX Servers / VNC Workstations", so if I want to connect 
from 1) NX client to 3) VNC workstation, I connect from 1) to 2), and 
specify a VNC session to use on 3) workstation.


But it's impossible to connect from 1) to 3) NX server, as there is no 
such similar option for UNIX/X as for VNC / Windows proxying.


Has anyone a solution for that?


Tomek