Hopefully you haven’t missed the fact that the latest version of After Effects has a new effects masking feature that will allow you to use masks specifically for effects on a layer.

Learn the new masking effects workflow, new to Adobe After Effects Creative Cloud 2014

Effects masking is a huge deal. You are now able to create masks that will limit an effect’s region on the layer, and it is all within the layer. Pretty great stuff.

Here, Sean Frangella walks us through how to use the new After Effects Effect Masks, covering adding masks to effects, animating the masks and also adding adjusment layers with multiple masked effects, in a practical example.