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Your LimeSurvey version: LimeSurvey Community Edition Version 6.12.0 
Own server or LimeSurvey hosting: Own server
Survey theme/template: Default one
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Hi,
I have a set of 20 question groups and I want 2 questios groups to always come up (as my control) and 8 to be randomly selected from what is available.
So for example: User 1 sees question group 1, then 2 and then 12-20. And then User 2 might see  group 1, then 2 and then 3-10.
Is such a thing possible? 

Thanks a lot in advance for any help!
 

If the order of these two randomly chosen question groups does not matter, assign all question groups to the same randomization group.

Then set the relevance/Expression script  of all these question groups to 0, except for the first two ones, which you leave at 1.
Now the question groups in that randomization group will randomly switch places, but only two will be shown.