If I understand you correctly, here goes:
I have a heated liner, heated gloves, heated trouser liners and heated socks.
The gloves are powered via the jacket and the socks via the trouser liners, but I can adjust the temperature of each of the four items independently of each other. For example: I can have the jacket on level 10, the gloves at 6, the trouser liners at 2 and the socks at zero or any permutation thereof.
To do this I have two of the bike powered twin remote 'Troller' controls:
http://www.warmnsafe.com/dual-remote-control-heat-troller/
I mount each (one on top of the other) with supergrip Velcro onto the bike's clutch reservoir, not forgetting to loop the safety lead into place, just in case they fly off whilst I hoon my awesome steed through the twisties.
I have used all four together several times, including three days in the Ardennes in March when the mercury hovered between -4 and zero all the time. Unbelievably comfortable, way better than any alternatives I have ever tried. Buy and use with absolute confidence.
Yup, if you want to control two items (or more) you'll need the twin controller and the twin receiver, as shown in the link. They will control assorted makes of electrical clothing, so they do not need to be all of the same brand. You may though need to convert the electrical connectors between the receiver and the garment. This is easy enough and you can often buy suitable converters.
PS The twin 'Troller' shown in the link is the version where the 'Troller' itself is powered by its own internal battery. These are fine and make it easy to swap from bike to bike. I used one for several years without a problem of the AA batteries going flat. I switched to the bike powered version, just because I could.
The system is quite clever in that, should the remote 'Troller' ever fail, the clothing will still be heated, you'll just not be able to adjust the temperature. So no worries should the AA's expire. Mine never did; just be sure to turn it off!
PPS As I don't fear that everyone will steal everything everyday. I left the 'Troller' on my bike at lunch stops etc. You might chose to do differently
