You can search through the list of members, but it would take an age to find where anyone lives. Also, probably the majority of people do not actually put where they live
Would be a better idea to start a thread asking if there is anyone in your area - that way you will get the people who are active on COL, there are loads of people who are registered but who no longer or rarely come onto the forum
If you are thinking of organising a meet up of people local to you, you could start a thread in the COL meet ups section
Have just noticed that you are in Germany - tbh it is unlikely. We do have some overseas members but the majority are in the UK