Ignore indirect lightning using light channel

Hey guys.
I’m testing a project where I have to see the exterior and interior of a small house, but the skylight is not doing the trick and I have interactive lights (so no baking from interior lights such lamps, spots, etc…). I thought about using the bouncing card method, changing the channel from the exterior walls to only recieve sunglight, but when I bake it, the indirect light from the boucing cards affects the outter walls. Is there a way to change channels for indirect lightning?

Exterior not getting direct light (That’s ok)

Exterior getting indirect light (Only the interior should recieve indirect light from bouncing cards).