web form user identity

 Is it fairly common for a form on a website, e.g. fairly basic ‘feedback form’ not associated with an account, e.g. user login, for the web server and/or component of the sites development 'stack' to capture the IP address of the user who submitted the information on the form/clicked submit etc? Or do the default logs typically just capture site visits, as opposed to user activity on a site, such as submitting a form?
I don’t know at this stage the development stack the supports the website, but presume it may be the WISA stack. Out of interest, where typically in the ‘stack’ (assuming they are captured at all) are the logs typically stored, e.g. default OS folders, web server specific directories, the database etc etc.
And in addition, were a user purposely trying to disguise/hide their location when submitting information on a sites form, what kind of tools/techniques would they typically use these days? And are such methods generally expensive commercial software programs, or are there fairly easy to access open source options? Would there be fairly obvious signs in the logs if a user had used such an anonymity app to hide their location/identify when submitting the form?