Possible to use textures like Layers?

Hey guys is there a way I can use the textures in Blender as I do in gimp? like a layer?

Well here’s what I mean.

My characters Pupils are staying within the eyelid and can move freely inside the area of the head that’s been cut out.

Basically, Eyelid is over my skin Layer, Skin layer is over my Pupils, and Pupils are over the white area.

Is there a way I can do some sort of Z layer order in Blender? I tried putting them all in one material and stick them in the same area but it didn’t seem right.

The material texture panel has various texture slots (maximum 18). You can layer textures with different blend modes