My wife and I share an iMac, and our iPhones keep populating with each other's apps. iTunes keeps trying to update my phone with my wife's apps and data. Is there a way to update the settings on the phone so it can distinguish the difference between App Store accounts?
Easy way: create multiple user accounts on your Mac, a tutorial can be found here.
Hard way: create different iTunes libraries for your user account. You'll need to:
- Quit iTunes
- Hold down the Option key and then launch iTunes
- Click the "Create Library..." button on the dialog that is displayed
- Once you've created the different libraries, you need to remember to use the Option key and then "Choose Library..." to switch between the two every time you start iTunes
A multi-part tutorial can be found here.