Multi group, Multi category panel data regression

#1
Good evening
I have a problem on my hands.
I need to regress the following:

I have 5 separate groups of panel data with one reference group.
Each group tracks the same variables of individual company's over 5 years.
These companies are sorted according to industry.

My question:
How do I match and regress the observations according to industry from the other four groups with the reference group ?

In this case i am comparing the levels of business success of belgian entrepreneurs with neighboring country immigrant entrepreneurs, immigrant entrepreneurs from further than neighboring countries , immigrant entrepreneurs in a team with belgians and immigrants in teams with other immigrants.
Each needs to be matched according to industry to ensure that we are comparing apples with apples.

Please help, which model should I use and how should I perform the analysis ?