Steps for loading non vendors into SAP CLM

Hi Experts!!!,

I am very much new to SAP CLM and would like to seek your guidance in solving one of the below query.

I am using SAP CLM 9.0.

Requirement :

Need to stop non vendors (employee records - 1000xxx) records loading into CLM.

How should I proceed as beginner to check whether the non vendor records are at first loaded into CLM where.

Secondly, if the non vendor records are available in CLM then in that case how should I proceed to filter out that and make sure that employee records are not loaded.

P.S. I am still learning and in very early stage of learning.

Any help/ suggestions are welcome.

Regards,

rythm.