As the virtual communities blossom in recent years, it also drives the Community of Practice flourishing in various communities, for example the booming of female-organized communities. Previous studies on virtual community were lack of research on female-organized, technology-oriented Community of Practice. This study aims at exploring (1) whether members in the female-organized Community of Practice will develop different informal relationships and interaction within the group in compared to the other communities. (2) Will female-organized Community of Practice show a higher degree of knit and dense social network than the other communities? (3) Will those high knit and dense female-organized Community of Practice also show higher degree of knowledge sharing than the other groups? A total of 19 female respondents were interviewed and surveyed. These respondents joined both the female-organized (WoFOSS) and gender-unspecified common Free and Open Source Software Communities of Practice. Their social networks and knowledge sharing behaviors in each of the group were compared. First of all, the result of this study suggested respondents who participated in female-organized Community of Practice did show a higher trust within group when compared to their joins in the other communities. Secondly, the findings indicate that members in female-organized Community of Practice show no significant difference in size, density, frequency of social networks in compared to their participation in the other groups. Finally, overall effects of social network on the knowledge sharing were found across two communities. More specifically, high degree of social networks in female-organized Community of Practice had significant and positive effect on sharing of explicit knowledge.