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Pg326 SR4A - Combined with a wireless link, you can set your clothing to display messages and images from a library file on your commlink, change color according to the weather forecast, or even glow brighter when in the vicinity of more commlinks.
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Pg327 SR4A - Shock Frills: These strips of “fur” are electrically charged when activated, standing on end and inflicting Electricity damage (p. 163) to anyone that comes into contact.
Looks like the precedent is set here to have your commlink control clothes via wireless. I'd imagine shock frills are activated in the same manner, then discharged on contact when active. Suppose that means a skinlink would work by proxy.