When/who uses ‘connector filter rules

Forum Members,

I have a confusion as in when/who uses ‘connector filter rules’?

Do these rules get applied during import or during synchronization?

To make it more clear say my ‘authorized data source’ MA has only two run profiles, full import and full synch.

When connector filter rules will apply, during full import orduring full synch?

Kindly help.

Thanks in anticipation.