Now unlike other provinces, Quebec's provincial elections are a different beast so you cannot automatically assume those who voted CAQ will go Conservative, PLQ Liberal, QS NDP, and PQ BQ, its a bit more complicated but it can at least give one an idea of the ideological orientations as the 2018 provincial election was probably the first since the Quiet Revolution fought more on philosophical orientation as opposed to separatism vs. federalism.
In its poll done in late January Léger had numbers on federal vote according to provincial vote. At that time the federal numbers were:
PLC 39, CPC 21, BQ 21, NDP 8, PPC 6, Green 5
Provincial vote: CAQ 42, PLQ, 22, PQ 18, QS 15, Other 3
Data on the second page
https://leger360.com/wp-content/uploads/2019/02/Politique-QC-publication-le-2-f%C3%A9vrier-2019.pdfCAQ voters: LPC 28, CPC 29, BQ 16, NDP 6, PPC 6, Green 1
PLQ voters: LPC 75, CPC 13, BQ 0, NDP 2, PPC 4, Green 3
PQ voters: LPC 14, CPC 13, BQ 54, NDP 7, PPC 2, Green 3
QS voters: LPC 24, CPC 7, BQ 23, NDP 18, PPC 3, Green 12
At that time the NDP was behind the Liberals and Bloc among QS voters, which might explain why it was in single digit in that poll. NDP and QS seem to share some organizers and volunteers, in Montreal anyway.