The difficulty seems to be getting audio to WSJT-X off the second receiver. I’m not sure how, or even if it is possible, to run separate instances of VAC and CWSL_WAVE_SSB.
At present CWSL_Wave and CWSL_SSBWave only work with the shared memory created by CWSL_Tee.dll. If you copy this DLL to a new name like CWSL_Tee2.dll in a separate skimmer folder, which is the only way to make everything else work right now, the shared memory that it creates will have a different name or "identifier" (it ends with a "2"), and this keeps everything independent.
W2AXR is working on an enhancement to CWSL_SSBWave so that will be able to access the memory created by CWSL_Tee2, or CWSL_Tee3, etc., so you may be able to try something soon. But we need to be patient.
In the mean time, try the standalone FT8 skimmer as explained by SM7IUN,
here. Typing some Unix commands to set things up is really not that hard, and you only have to do it once.
73,
Bob, N6TV