I'm not sure what you mean by different versions of Linux. Virtually all distributions conform to the Linux Standard Base (LSB), so that's what you program to.

Maybe you're referring to whether KDE or Gnome should be used (because obviously Poser would be a GUI app). But again, I can't think of a distro that doesn't have both sets of libs available for it.

Or maybe you mean using RPM or Deb for packaging. (But many commercial apps use custom installers anyway).