Perhaps you need to begin a procedure with the City of Lausanne. The various topics dealt with here provide you with a wide range of information on the services offered by the city's administration: how to obtain documents, procedures to be followed, on-line or downloadable forms, service contact-information, wicket opening-hours, etc.
Information on procedures to be followed with respect to the Canton of Vaud and the Confederation are included here in order to facilitate your searches.
The site headings, such as City Practice, provide you with access to various information on life in Lausanne.
In addition, the www.ch.ch website provides you with a list of contacts with the various City authorities.
Nationality - Civil Status