How to use two users in one source tree

[kondal durgam]

I'm working in two different projects so, can i use one source tree for both different project .
at a time is this possible to use in source tree. I tried but if i did anything wrong it will effect another project aslo 

[Timothy]

If you're using two different projects (bookmarks) in Sourcetree, you can go into Settings > Advance > User information and configure the user for each project.