"Block remote input on local activity" option in RealVNC

[j t]

Hi all.

I have a question regarding the RealVNC server (I'm currently using
Free Edition 4.1.2):

There is an option in an alternative VNC implementation (TightVNC)
that lets me block remote input during periods of local keyboard and
mouse activity.

Is there anyway that I can get the RealVNC to do the same thing?
(Apologies if it seems like I'm trolling - it's just an honest
question.) I've looked through all the tabs in the RealVNC Server
Properties window, but I can't find anything suitable...

Thanks in advance for any help you can offer.

Jaime