The last time veteran Dublin tech entrepreneur Brian Maccaba was embroiled in a high profile court case, it was about sex, money and reputation. This time, it’s about money, an elaborate corporate web, alleged “underhand” dealings and a business merger gone awry. The case has yet to go to a full hearing but preliminary court filings show the 61-year-old is accused of using a “front” as part of an elaborate ruse to acquire a 50 per cent stake in Dublin tech firm Waratek Ltd, valued at up to $28 million. Maccaba is best known as the founder in 1989 of…