I just noticed an interesting wireless networking article by Brian Chee at InfoWorld. In it, he walks through the process of using LEAP on Windows Mobile with a Wi-Fi network. Here's an excerpt:

However you get to it, Windows Mobile has a communications manager someplace. I can tap my power button or go through start and find settings; it doesn't matter, just get there.

Here's where familiarity killed me. I kept blasting past this menu into "WiFi Networks" and, in the process, missed "LEAP" right in front of my nose.

It would seem that this LEAP supplicant should and can support multiple LEAP credentials depending upon the wireless SSID.