Can we limit / restrict the access of an user for OSB Console?
The answer is YES.
Please refer to Oracle Documentation:
Document NAme: Oracle® Fusion Middleware Developer's Guide for Oracle Service Bus 11g Release 1 (220.127.116.11.0)
Part Number E15866-03
Section: 48 Configuring Administrative Security
Link to Document: admin_security.htm
Oracle provides some predefined Integration roles which we can use. Also there are options to create customized roles.
If you are keen in learning more about creating users and customizing roles read further in this section 48.3 Configuring Administrative Security: Main Steps
Have a good one. :)