Now the history is mixed,how can I filter by user ?
Here's how to do it using TortoiseSVN on Windows:
Right click your repository and you should have a menu like the following, in the TortoiseSVN submenu at the top you have "Show log" like this:
Clicking that will get you the log window where you can get all the information you want.
For me this shows only my actions on that repository when I put in my username.