Hi, ychrenmail:
You can use the ADV EDIT->BUILD WIRE PATH command for it. The command basically allows you to draw a series of vertices in the 3D space and build a wire. You have an option to build a port at any of entered vertex. For example, you want to build a structure like this:
----A------top metal------------
\
\
B side view
/
/
----C--------bottom metal---------
You can enter the vertices A, B and C. Then, select ADV EDIT->BUILD WIRE PATH. You can choose to define ports at any or even all of the point A, B and C in the dialog. For the A and C, if you don't define port on them, you have the choice to make sure the conneciton between the wire and the top metal and bottom metal.
Best regards,