Is it possible that different update is available for different customers?

Is it possible that different update is available for different customers? With wyBuild I do not see this possibility.

Thanks a lot, that is i want. If automatic update is installed as a Component in exe, should the "wyUpdateCommandline" property be set with argument Updatepath? If yes, i think that UpdatePath can also be set in software config and be set to wyUpdateCommandline for automatic update in runtime, right?

wyUpdateCommandline" property be set with argument Updatepath

Yes.

If yes, i think that UpdatePath can also be set in software config and be set to wyUpdateCommandline for automatic update in runtime, right?

You should set it before you call any AutomaticUpdater functions. Ideally, set it in the constructor of your main form.