I believe so yes. But you can have more than one apple i/d per machine anyhow. For example our family apple i/d for iOS & Mac is
something@virginmedia.com. However I have my account on the iMac set up to my apple id which is
myname@me.com. So when it comes to email, iMessage or FaceTime I just get the myname stuff. However when I go to the app store it uses the only account I have set up there being the something@ one. So you don't really need to switch as such.