Welcome aboard!!!
as long as the PC's are yours they don't care
what it means is only 1 person can collect per household
you can have multiple machine either under your own name or under different names at your house -
only thing is only 1 person can collect EVGA bucks per household (max $10 for both tiers)
so unless you want your family to collect points under individual names (internal competition) or they want to have their own folding stats - their own contribution
ie your wife may want her own stats your son may want his own stats - but only 1 person can collect the EVGA bucks - and only for 1 of the accounts
it best to fold under 1 account
the clause you are referring to is for instances where fellow teammates help other member get to their tiers (when they can't do it)
ie... you fold for me or I fold for you - when your short or away...
That is not allowed