No, Coherence mode is only for Windows VM's. Coherence for Linux may be implemented in one of the future versions of Paralells Desktop
Has coherence been fixed/added for ubuntu in Parallels 8? They mentioned it would/might, I certainly hope it has.
the current version of Ubuntu is 12.04, with 12.10 coming out VERY soon. P.S. coherence DOESNT work properly in Parallels 8.... still! :-( http://forum.parallels.com/showthread.php?p=641180#post641180