Execute comand after connection is established

SQL Optimizer 9.3.4
In Toad you have a feature that after connection some script is executed.
I would like to have such a feature as well in SQL Optimizer.
Why?
I cannot use sys/system users-security.
My default role (after I login through my proxy user) do not allow me to get a plan. After I execute one script I am able to get plan but i cannot do that in SQL developer ...
So, can you implement such an ask?
Brg
Damir