We need to block specific cities, but not States...

The zencart set up for our client delivers within the continental US. They deliver to New York State, and California. But NOT to NY City, Oakland, or Los Angeles.

Zencart gives them control over what orders they will or will not accept, of course. But they say they want Zencart to not allow customers to even place an order, if they do so from these locations.

Is there any way to do that? You can remove specific states from Zencart so they don't show up in your delivery dropdown menus of addresses when placing an order. But can you flag the site in any way so that if someone places a delivery from Oakland, CA, Los Angeles, CA, or NYC, that the order will be blocked?

Any help is appreciated. I'm a designer, not a coder - but they seem to want coding out of me, and that's beyond my ken...

Thanks in advance -

Maybe you could adapt this: http://www.zen-cart.com/showthread.php?193601-PO-Box-Ban
I suppose the concepts which flag addresses which contain the letters spelling "PO Box" and require the customer to enter a real address might be adaptable to your situation. Point it at the ['city'] value instead of the ['street_address'] and ['suburb'] fields.

Sounds like it could work - I'll try it out.... Thanks!

So.... What if someone in Los Angeles wants to order for cousin Jimmy in Seattle? Might want to base this on the shipping address versus the billing.