Hi Atıf,
yesy you can control fund center level. Create a commitment item as dummy. Use this commitment item for all budget entry with fund center. For example if you have 3 fund center, you will create budget as below;
Fund center A Commitment item Dummy
Fund center C Commitment item Dummy
Fund center C Commitment item Dummy
By the way, you can control this fund center %50 , %80 etc. as warning , error or information from SPRO.
Regards