To configure the plugins it is possible to put your own configuration keys in the config.ini file of the plugin in the configuration group [custom]
In addition it is possible to use configuration variants in this file according to the machine profile (DEV, INT and OPER) as specified in the documentation of the opinionated_configparser library (https://github.com/metwork-framework/opinionated_configparser /blob/master/README.md) by specifying the profile of the machine in the /etc/metwork.config file
So that's what I did
In my /etc/metwork.config file we find DEV_PIPOUF
In the config.ini file of my plugin
[custom]
# header transmits mobile user
header_transmet_mobinaute = SFFR90LFPW
entete_transmet_mobinaute [DEV] = SFFR91LFPW
entete_transmet_mobinaute [DEV_PIPOUF] = SFFR92LFPW
Welcome on vmdevcentos6 (vmdevcentos6.ad.meteo.fr, None)
(module: MFDATA, config: DEV_PIPOUF, version: 1.0.2)
15:33:07 up 19:44, 14 users, load average: 0.23, 0.12, 0.03
⌁MFDATA⌁ [joel: ~ / work / gitlab] $ plugin_wrapper obsparticipative - env | grep MFDATA_CURRENT_PLUGIN_CUSTOM_ENTETE
MFDATA_CURRENT_PLUGIN_CUSTOM_ENTETE_TRANSMET_MOBINAUTE = SFFR90LFPW