How to determine whether a user is currently using Portal or Tempo?

Anyone know of a way (similar to loggedInUser()) to determine if pp!initiator is currently interacting with portal or tempo? We have several workflows that may need to straddle both platforms until we've completely moved off portal. It would be nice if we could fork sub-process calls into the appropriate user forms....

OriginalPostID-156430

OriginalPostID-156430

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