Select NFS User (OpenELEC)

Hi,

Running OpenELEC and using unRAID as my server

Not sure how to specify which unRAID user that KODI is using to access NFS network shares. I have two different accounts, one for my lounge and one for the bedroom, but would like the NFS connections to use the relevant user. Easy to do using SMB, but NFS seems to elude me!

Anyone know how to do this?

thanks