Submit parameter with loadtestrunner.bat to testcase

Hi all,

I have a SoapUI project where the test suite contains 12 test cases. Each 2 of the saop requests are identical except for one value. I start the load test by calling Loadtestrunner.bat via Jenkins on 6 servers. Is there any way to pass a value to a single test case via parameter? In all the docs I found only global, system-wide and project parameters, but not parameters for individual test cases.
I have already filled many variables via Groovy Script, but this parameter must be passed at startup.