I got 322 marks in met out of 800 can i get civil department in any of the campus

This is the link to previous year cutoffs of Manipal Entrance Test according to ranks:
https://engineering.careers360.com/articles/met-cutoff
You might be aware of the fact that MU OET just changed it's marking scheme this year.
So it's difficult to predict cutoffs manually. As ranks are not known, cutoff marks can't be calculated.
As of now, you can estimate the cut off ranks according to the previous year trend only. Link to which is given above.
4th of May was the estimated date of merit list declaration.
It might be just a few days away. So you can better wait for the actual result as other sources are not trustworthy due to the change in Exam pattern.
After the results are out you will be able to get the idea of cutoffs.

Hope this helps :)
Best of luck!