Mac-on-Linux is an opensource project. It requires X11 to run. I'd think you could try installing Apple's X11 package and the developer tools (available for download when you give them your email address and register as a 'web access only' developer).
That would still run into the abstracted hardware ability that Mac-on-Linux currently has with Linux. The OS or any application has to talk through the APIs so any app that required direct access to a SCSI card or other hardware wouldn't work. The booting process for linux may require such an access. BootX is likely the bootloader you'd need to get the emulator to boot into Linux.
Worth a shot! I'm not sure how it would react to then trying to boot linux. Let us know if you could get this to work!
Their FAQ states the following:
http://www.maconlinux.com/faq.html
Q: Does MOL run on non-Apple hardware?
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A: It does. MOL runs for instance on the Pegasos board, the Teron board and on AmigaOne hardware. In short, MOL should run on any PowerPC hardware (with the except of 601-based systems). However, the EULA of MacOS prohibits its usage on non-Apple hardware (it is of course perfectly legal to use MOL to boot a second Linux though).