That's just not how this plugin works. This plugin links the static clothing to
Bones. What you want to do is linking to a
Vertex. There
is a plugin that does the static clothing effect with vertex linking but it's not this plugin.
Its
@regguise's
Static Clothing Ampliated. There is a bit of a learning curve there, and you'll like have to do some major adjustments to the offsets to have the brows properly placed on the face. You'll also likely have to make the brows into separate clothing for the left and right eyebrows, in order to link each brow to separate vertices, otherwise you wouldn't have your characters able to make expressions like this:
Make sure you read the usage instructions too, as picking the vertex is
not intuitive(though easy to do once you know how it works)
one other thing, if you're planning on using vertex linking for eyebrows: you're probably going to have to make some custom morphs for the expressions you want. I'm not sure how well the movements of a single vertex in your average expression morph would translate into the movements of an eyebrow linked to that vertex specifically.