I knew this was possible but I guess a lot of people are unaware of this functionality.
Somebody told me I should blog about it, so here I am adding another entry to my Blog.
How to define the BitWise and in a send port.
Define a property schema in biztalk and make sure one of the properties is of the type unsigned int.
Now deploy that propertyschema.
Now add a send port and go to the filter Expression.
Select the Unsigned int in the first part of the Exprssion
Then open the dropdown and see... there it is ...
the magical, almost undocumented, rarely seen, extra operator &. (standing for Bitwise AND)