This print plug-in in CinePaint’s interfacing with Gutenprint is available since quite a time. The blackpreservation option can be found in the first print dialog in the lower part. It affects only CMYK-CMYK conversation. Below is a colour conversion from a ISOcoated to a desktop inkjet with very different gamut shown. The inkjet’s black has a brownish shade. The screenshot shows the visual output on screen:
It is not perfect, but gives you an idea what is available now. The on the fly creation of the device link happens in the background within littleCMS (or lcms), CinePaints internal used colour management modul.