Several comma-separated tags will be considered as logical AND between them. You can also use semicolon for logical OR. AND has a priority over OR and you cannot use parentheses for logical grouping. Asterisk (*) within a tag will be regarded as a mask for "any string".

Found in forums

> Waiting For Host
    FORUMS / Armed Assault / Troubleshooting   ||  Tags: For, Host, Wait
> New mission: Flying for fun
    FORUMS / Arma 2 / Missions: Complete   ||  Tags: Flying, For, Fun, Mission