Is it possible for 2 iTunes accounts on one computer?

Question

I want to have my own iTunes account, but every time I try to upload a new iTunes, I keep getting my daughter's iTunes.  I want my own so I don't have to share with her.  How can I do this on one computer?

Answer 1

Create a separate iTunes library for each device. Note: It is important that you make a new iTunes Library file. Do not just make a copy of your existing iTunes Library file. If iTunes is open, quit it.
Mac users: Hold down the Option key while you open iTunes.
Windows users: Hold down the Shift key while you open iTunes.
In the dialog that appears, click Create Library.
Name and save the alternate library file. iTunes opens with your brand new library file.
Open iTunes Preferences. Choose iTunes > Preferences (Mac) or Edit > Preferences (Windows).
Click the Advanced tab.
Deselect the "Copy files to iTunes Media folder when adding to library" checkbox if it is already selected and click OK. This will prevent iTunes from creating duplicates of your existing media files in the new library folder.
Add the specific media files you want on your device to iTunes either by dragging them into iTunes or choosing File > Add to Library (Mac) or File > Add File to Library or Add Folder to Library (Windows).
Once you have the iTunes Library just how you want it, connect and sync your device.
Once the sync is complete, quit iTunes.
Mac users: Hold down the Option key while you open iTunes.
Windows users: Hold down the Shift key while you open iTunes.
Click Choose library.
Choose your original iTunes Library and click Choose (Mac Users) or Open (Windows Users). You can now switch back and forth between the different libraries for different devices."
http://support.apple.com/kb/HT1495