jitter object with multiple outputs

hello there... I'm currently trying to get my head around making jitter externals, interesting puzzle :-)
I would like to make an object with 4 matrix outlets, the 4th matrix outlet should not always fire, only on initialisation and on request.

I can make the 4 outlets, but how do you set an outlet such that it will not output a matrix while the other 3 continue their business? Is that possible?

Thanks, Timo