Hi,
Software used - ORcad Schematic v16
I just tried a simple method to keep a 5 Pin connector out of netlisting .
What I did was --> go to the 5 Pin connector properties,on the bottom end you can see various tabs like --Schematic nets---Flat nets etc-->Amongst these tabs is a tab called as Pins which when u click will display a table containing of the 5pins and their respective nets.
What you can do so that it doesn't netlist is tick mark the "Is No connect" option available in the rows.Thus making sure that it doesn't netlist.
Or further more you can remove the net name and give it a "-".
Pardon me for my bad English but hopefully I conveyed my message and it worked out well for you.
Thanks