That only relative data to that person should be shown to the user
Entries related to respective persion should be visible to that person and not all entries.
This behavior is intentional – in a group, we believe that all group members should be able to see all expenses. This allows members of the group to more easily correct mistakes and get an complete picture of what’s going on.
On the web, if you wish to view only the expenses that involve you, you can click “Hide items not involving me” under the “Other actions” menu.
For more, see this helpdesk article: http://feedback.splitwise.com/knowledgebase/articles/89944