外籍人士持Working visa 來港, 期間曾犯事在港入獄10個月, 由出獄開始計, 連續住滿7年, 是否還能申請香港居留權?

Unable to answer.

1. In processing the application for the right to abode, the Immigration Department takes no consideration of the applicant's criminal record.

2. Generally speaking, unless a person is holding a residence visa (such as a dependent visa), all other visa are not eligible for the right to abode even after 7 years of ordinary residence.

Bottom line - the visa the foreigner is holding currently determines the fate.