thanks for the recommendation
i will definitely play with LNbits to see what cool stuff it can do!

Ok I understand now what you mean. I agree.
Play around with LNbits and you will find out that is very handy for this.

Anyways, signing with LN-auth it doesn't "link" your wallet with that service.
SN or the service it doesn't know what wallet is... you are just signing with a key, it doesn't matter what is doing that key.

DarthCoin

i agree it is usually unnecessary to have multiple accounts on the same website, but i think it is valuable to isolate the wallet profiles for different websites, just to avoid linking them

bitcoin

wallet / application to manage multiple login accounts with LN (LN auth)

One word: LNBits.
But you should not use multiple accounts. Is lame.