I should also point out that another rival system out there, DXO Photolab also has what they call a channel mixer in its optional extra, FilmPack 5. However, this is for changing the amount of the various channels in a conversion to black-and-white. It cannot be used for faux colour infrared conversion.
|The Luminar Channel Mixer 'Filter'|
A set of presets (which includes a channel mixer stage for faux colours and various black-and-white options) has recently been made available by Laurie Klein Photography for $9.95. I have tried them and they might produce a reasonable starting point for some people but I would find it just as easy to build my own presets using settings for Photoshop devised by Bob Vishneski (see my post of 12 June 2017). The problem with somebody else's presets for infrared is that what you get depends on the filter/sensor combination is in the converted camera.
One slight criticism of Luminar is that when things start getting complicated with lots of filters applied, there is a really noticeable lag from moving a slider to seeing the result appear on screen. That may be a property of my now old Mac but I do not have that problem in Lightroom and/or Photoshop.
For those looking for a different or much cheaper option for faux colour infrared images, Luminar 2018 has a lot to offer.