The AnalysisFilter used as the pitch detector can't be continuously altered while it is playing, but you could create new instantiations based on different arrays of pitch classes at different times in the Script. Better yet, you could make several copies of the Tuner, each with a different set of pitch classes, and put those copies into a Multigrid track so you could swtich between them at will.
Let us know if you'd like any tips or guidance on one of these approaches.
Thanks!