Wireless reconcile won't do it for what you need. You can go to you carrier's BIS website where you setup the email to go your blackberry and set a filter there you can turn on and off at will, select the settting "do not forward to handheld".
However, I warn you, when you turn it back on, any email that has not been deleted from that POP account will ALL come flowing down to your BB.
Nope. Your other option would be to configure forwarding rules on your mail host and send what you do want pushed to your @carrier.blackberry.net account.