|and need broadcast in network B|
I'd like to know that you mean by the above. Broadcast what exactly? What is it you need this computer to do in the workgroup?
Now, about these two networks. Are they physically located in the same building? Do they get access to the internet through the same gateway or are they completely separate networks? What subnet's are you using for them?
It matters not how straight the gate,
How charged with punishments the scroll,
I am the master of my fate;
I am the captain of my soul.