Can I use Open Directory with a Leopard client and a Lion server?

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http://serverfault.com – I've looked around on the interwebs but I can't find any sort of answer. I just picked up a Mac Mini and I'm going to throw Lion Server on it for my network. Most of my computers are running either Leopard or Snow Leopard (one iMac is a PowerPC so I can't upgrade to Lion). I'd like to use Open Directory for all my network authentication but I want to make sure that the Lion Server can authenticate my iMac running Leopard. (HowTos)