function onEdit(e){
var ss = SpreadsheetApp.getActiveSpreadsheet();
var sheet = ss.getActiveSheet();
var range = e.range;

var Column = range.getColumn();
var Row = range.getRow();

if (sheet.getRange("A"+Row).getValue() != '') {
var RangeProtection = sheet.getRange("A"+Row);
var User = Session.getEffectiveUser();

var protection = RangeProtection.protect().setDescription('Protected ' + Row);
protection.addEditor(User);
protection.removeEditors(protection.getEditors());

if (sheet.getRange("B"+Row).getValue() != '') {
var RangeProtection = sheet.getRange("B"+Row);
var User = Session.getEffectiveUser();

var protection = RangeProtection.protect().setDescription('Protected ' + Row);
protection.addEditor(User);
protection.removeEditors(protection.getEditors());

if (sheet.getRange("C"+Row).getValue() != '') {
var RangeProtection = sheet.getRange("C"+Row);
var User = Session.getEffectiveUser();

if (protection.canDomainEdit()) {
protection.setDomainEdit(false);
}
}
}
}
};