A flexible csv filter/rewriter, built for Luxembourg's addresses and street lists, but should be adaptable for others.

• sources -> obtain the values from anywhere you want
• rules -> modify values
• enhance -> add values, or replace based on another key
• filter -> drop values

• Execute the utility to produce the required .csv files. See run.sh for an example of how to do this.
• Open luxembourg-addresses.csv in JOSM, right-click the layer, select Save As... and save it as csventrifuge-out.osm. Make sure to install the OpenData plugin in JOSM first.
• Run the following command:

grep -vE "(luref|id_caclr_rue|commune|id_geoportail)" csventrifuge-out.osm | sed -e "s/localite/addr:city/; s/id_caclr_bat/ref:caclr/; s/'rue/'addr:street/; s/numero/addr:housenumber/; s/code_postal/addr:postcode/; s/action='modify' //;" >| $(date +%Y-%m-%d)-addresses.osm

• That's it! You can now open 2018-09-10-addresses.osm in JOSM.

Another way of doing it if you don't need action=modify:

echo addr:street,addr:housenumber,addr:city,addr:postcode,ref:caclr,lat_wgs84,lon_wgs84,commune > $(date +%Y-%m-%d)-addresses.csv
cut -d , -f 2-5,7-9 luxembourg-addresses.csv | tail -n +2 >> $(date +%Y-%m-%d)-addresses.csv
open -a JOSM.app $(date +%Y-%m-%d)-addresses.csv

https://github.com/roelderickx/ogr2osm could be used to translate from csv to osm too.