If advertiser and manager are OK with that - how is killyou cheating?
In that case, it is not. Thought this is one of those rare cases. If you PM'd me asking to get enrolled with two accounts,
I'd probably block you and tag both.
That's only fair if campaign has 'no alt accounts' rule. If there's no such rule (as with 777coin campaign), I see no grounds for red-tagging. There's no harm in asking.