More to the question than just 'can I'. Read the section in the Parallel Job Developer's Guide on Incorporating Server Job Functionality. It's page 2-33 in my copy and gives details and caveats of using them in a PX job.
-craig
"You can never have too many knives" -- Logan Nine Fingers
A server container can be used in PX a.ka EE, but it is highly not recommended by the product vendor since it invokes the DSserver engine for the process.
It might possibly even give you performance issues.
Creativity is allowing yourself to make mistakes. Art is knowing which ones to keep.