is there any way to show only owner sessions not the other ones?
Probably. What do you mean by "owner" session?
the user is allowed only to see his own processes not the others
The below might not pertain to your specific situation, but it shows how you can create a custom filter for the Session Browser.
In this example, 'S' refers to v$session. You can make that subquery whatever you need it to be.
very nice, thank you