[openbox] Per-Application settings on terminal applications

[rent0n]

Hi,

I was trying to set up some per-application settings for applications 
like mutt, vifm or ncmpcpp that run into a terminal.
The problem is that obxprop identifies all these programs like urxvt 
since they run inside urxvt.

Is there a way for openbox to distinguish between different urxvt 
windows that run different programs?

Thank you.

Cheers,
rent0n