Custom Content Dashboard Widget just on one subdomain

Hi,
I would like to setup to show Custom Content Dashboard Widget just on one subdomain - dashboard.
Is this possible?

I am using now two Custom Content Dashboard Widget:
1) for all dashboard
2) I am trying setup just for one dashboard on certain subdomain (it is some rules special for this subdomain)

It is possible to setup this?
I already have two widget, it works....

Thanks,

Bigdrobek