We currrently suppor this with ZynSampler and it can be done in several other ways, e.g. creating a soundfont for Fluidsynth, creating a SFZ for Linuxsampler or Sfizz, Using samplev1 engine. Using Sooperlooper. It depends on what your workflow is.
We are working on a new clip launcher mechanism that integrates with the sequence. This should be available in testing (Vangelis) branch soon but it will require some commitment from users to engage in testing before it reaches stable. We will describe what that means in a post soon.