Intelligent design is a misnomer which has many forms, but at it's core it challenges naturalistic causation for abiogenesis on prebiotic Earth.

It doesn't posit anything about other intelligence or life, just that the biological information necessary to kick off a self-replicating cell that undergoes evolution is too complex and too specific to happen randomly on Earth.

Even naturalistic panspermia theories are compatible with intelligent design, because it shifts the frame of abiogenesis to different conditions where cellular formation may actually become probable.