pick list value available for customer / management pick List values

Hi,

i'm writing a new application.
I need:
- fixe pick list values ( special applicationsuser cannot chagne the values)
- flexible pick list values (special applicationsuser can change the values)
for my package.

I search during my package creation to do that, but I don't find a solution.
Do you know what can I do?

Thx

Magalie